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Subject:	Chemistry
Topic:	General Chemistry
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AP Chemistry Tutorials with Sal Khan

Video Lectures

Displaying all 124 video lectures.

Lecture 1 Play Video	Introduction to chemistry A big picture intro to chemistry and why it is fascinating. Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.
Lecture 2 Play Video	Elements and atoms \| Atoms, compounds, and ions \| Chemistry \| Khan Academy How elements relate to atoms. The basics of how protons, electrons and neutrons make up an atom. Watch the next lesson: https://www.khanacademy.org/science/chemistry/atomic-structu... Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.
Lecture 3 Play Video	Introduction to the atom \| Chemistry of life \| Biology \| Khan Academy The atom, proton, neutron and electron Watch the next lesson: https://www.khanacademy.org/science/biology/chemistry--of-li... Missed the previous lesson? https://www.khanacademy.org/science/biology/chemistry--of-li... Biology on Khan Academy: Life is beautiful! From atoms to cells, from genes to proteins, from populations to ecosystems, biology is the study of the fascinating and intricate systems that make life possible. Dive in to learn more about the many branches of biology and why they are exciting and important. Covers topics seen in a high school or first-year college biology course. Subscribe to Khan Academy's Biology channel: https://www.youtube.com/channel/UC82qE46vcTn7lP4tK_RHhdg?sub...
Lecture 4 Play Video	Orbitals \| Electronic structure of atoms \| Chemistry \| Khan Academy Introduction to orbitals. Relates energy shell to rows and periods in the periodic table. Created by Sal Khan. Watch the next lesson: https://www.khanacademy.org/science/chemistry/electronic-str... Missed the previous lesson? https://www.khanacademy.org/science/chemistry/electronic-str... Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.
Lecture 5 Play Video	More on orbitals and electron configuration \| Chemistry \| Khan Academy How electron configuration is related to orbitals and the structure of the periodic table. Created by Sal Khan. Watch the next lesson: https://www.khanacademy.org/science/chemistry/electronic-str... Missed the previous lesson? https://www.khanacademy.org/science/chemistry/electronic-str... Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.
Lecture 6 Play Video	Electron Configurations Introduction to using the periodic table to determine electron configurations
Lecture 7 Play Video	Electron configurations 2 \| Electronic structure of atoms \| Chemistry \| Khan Academy Figuring out configurations for the d-block elements. Created by Sal Khan. Watch the next lesson: https://www.khanacademy.org/science/chemistry/electronic-str... Missed the previous lesson? https://www.khanacademy.org/science/chemistry/electronic-str... Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.
Lecture 8 Play Video	Noble gas configuration (old, low volume) How to write electron configurations for atoms and monatomic ions using noble gas configuration Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful. About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. Subscribe to KhanAcademy: http://www.youtube.com/subscription_center?add_user=khanacad...
Lecture 9 Play Video	Noble gas configuration \| Electronic structure of atoms \| Chemistry \| Khan Academy How to write electron configurations for atoms and monatomic ions using noble gas configuration. Watch the next lesson: https://www.khanacademy.org/science/chemistry/electronic-str... Missed the previous lesson? https://www.khanacademy.org/science/chemistry/electronic-str... Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.
Lecture 10 Play Video	Valence Electrons Looking at valence electrons to figure out reactivity More free lessons at: http://www.khanacademy.org/video?v=1TZA171yxY4
Lecture 11 Play Video	Groups of the Periodic Table Properties of alkali, alkaline earth and transition metals. Halogens and noble gases. More free lessons at: http://www.khanacademy.org/video?v=LDHg7Vgzses
Lecture 12 Play Video	Periodic Table Trends: Ionization Energy What an ion is. Using the periodic table to understand how difficult it is to ionize an atom. More free lessons at: http://www.khanacademy.org/video?v=ywqg9PorTAw
Lecture 13 Play Video	Other Periodic Table Trends Electronegativity, metallic nature and atomic radius.
Lecture 14 Play Video	Ionic, covalent, and metallic bonds \| Chemical bonds \| Chemistry \| Khan Academy Introduction to ionic, covalent, polar covalent and metallic bonds. Watch the next lesson: https://www.khanacademy.org/science/chemistry/chemical-bonds... Missed the previous lesson? https://www.khanacademy.org/science/chemistry/periodic-table... Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.
Lecture 15 Play Video	Molecular and Empirical Formulas Introduction to molecular and empirical formulas. Calculating molecular mass. More free lessons at: http://www.khanacademy.org/video?v=gfBcM3uvWfs
Lecture 16 Play Video	The mole and Avogadro's number \| Atoms, compounds, and ions \| Chemistry \| Khan Academy Introduction to the idea of a mole as a number (vs. an animal). Watch the next lesson: https://www.khanacademy.org/science/chemistry/atomic-structu... Missed the previous lesson? https://www.khanacademy.org/science/chemistry/atomic-structu... Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.
Lecture 17 Play Video	Formula from Mass Composition Figuring out the empirical formula from a molecules mass composition
Lecture 18 Play Video	Another mass composition problem \| Chemistry \| Khan Academy Another exercise converting a mass composition to an empirical formula. Created by Sal Khan. Watch the next lesson: https://www.khanacademy.org/science/chemistry/chemical-react... Missed the previous lesson? https://www.khanacademy.org/science/chemistry/chemical-react... Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.
Lecture 19 Play Video	Balancing Chemical Equations The art of balancing equations in chemistry! More free lessons at: http://www.khanacademy.org/video?v=RnGu3xO2h74
Lecture 20 Play Video	Stoichiometry \| Chemical reactions and stoichiometry \| Chemistry \| Khan Academy Introduction to stoichiometry. Using the balanced reaction to find molar ratios. Created by Sal Khan. Watch the next lesson: https://www.khanacademy.org/science/chemistry/chemical-react... Missed the previous lesson? https://www.khanacademy.org/science/chemistry/chemical-react... Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.
Lecture 21 Play Video	Stoichiometry: Limiting reagent \| Chemical reactions and stoichiometry \| Chemistry \| Khan Academy Stoichiometry problem where we find the limiting reagent and calculate grams of product formed. Created by Sal Khan. Watch the next lesson: https://www.khanacademy.org/science/chemistry/chemical-react... Missed the previous lesson? https://www.khanacademy.org/science/chemistry/chemical-react... Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.
Lecture 22 Play Video	Ideal gas equation: PV = nRT \| Chemistry \| Khan Academy Intuition behind the ideal gas equation: PV=nRT. Created by Sal Khan. Watch the next lesson: https://www.khanacademy.org/science/chemistry/gases-and-kine... Missed the previous lesson? https://www.khanacademy.org/science/chemistry/chemical-bonds... Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.
Lecture 23 Play Video	Ideal gas equation example 1 \| Chemistry \| Khan Academy Figuring out the number of moles of gas we have using the ideal gas equation: PV=nRT. Created by Sal Khan. Watch the next lesson: https://www.khanacademy.org/science/chemistry/gases-and-kine... Missed the previous lesson? https://www.khanacademy.org/science/chemistry/gases-and-kine... Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.
Lecture 24 Play Video	Ideal gas equation example 2 \| Chemistry \| Khan Academy PV/T is a constant. Figuring out the volume of an ideal gas at standard temperature and pressure (STP). Created by Sal Khan. Watch the next lesson: https://www.khanacademy.org/science/chemistry/gases-and-kine... Missed the previous lesson? https://www.khanacademy.org/science/chemistry/gases-and-kine... Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.
Lecture 25 Play Video	Ideal gas equation example 3 \| Chemistry \| Khan Academy Figuring out the mass of Oxygen we have at a given P, V, and T, and why we need to check the units of R. Created by Sal Khan. Watch the next lesson: https://www.khanacademy.org/science/chemistry/gases-and-kine... Missed the previous lesson? https://www.khanacademy.org/science/chemistry/gases-and-kine... Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.
Lecture 26 Play Video	Ideal gas equation example 4 \| Chemistry \| Khan Academy Figuring out the molar mass of a mystery molecule at STP. Created by Sal Khan. Watch the next lesson: https://www.khanacademy.org/science/chemistry/gases-and-kine... Missed the previous lesson? https://www.khanacademy.org/science/chemistry/gases-and-kine... Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.
Lecture 27 Play Video	Introduction to partial pressure \| Gases and kinetic molecular theory \| Chemistry \| Khan Academy Definition of partial pressure and Dalton's law of partial pressure. Example of calculating partial pressure of a gas in a mixture from the total pressure and partial pressure of the other gases in the mixture. Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful. About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. Subscribe to KhanAcademy: http://www.youtube.com/subscription_center?add_user=khanacad...
Lecture 28 Play Video	Partial pressure example \| Chemistry \| Khan Academy Figuring out the partial pressures of various gases in a container given the mass percent composition. Created by Sal Khan. Watch the next lesson: https://www.khanacademy.org/science/chemistry/gases-and-kine... Missed the previous lesson? https://www.khanacademy.org/science/chemistry/gases-and-kine... Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.
Lecture 29 Play Video	States of matter \| States of matter and intermolecular forces \| Chemistry \| Khan Academy Introduction to the states or phases of matter. Watch the next lesson: https://www.khanacademy.org/science/chemistry/states-of-matt... Missed the previous lesson? https://www.khanacademy.org/science/chemistry/gases-and-kine... Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.
Lecture 30 Play Video	States of matter follow-up \| States of matter and intermolecular forces \| Chemistry \| Khan Academy More on plasma and hydrogen bonds. Watch the next lesson: https://www.khanacademy.org/science/chemistry/states-of-matt... Missed the previous lesson? https://www.khanacademy.org/science/chemistry/states-of-matt... Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.
Lecture 31 Play Video	Specific heat, heat of fusion and vaporization example \| Chemistry \| Khan Academy Specific heat and phase changes: Calculating how much heat is needed to convert 200 g of ice at -10 degrees C to 110 degree steam. Watch the next lesson: https://www.khanacademy.org/science/chemistry/states-of-matt... Missed the previous lesson? https://www.khanacademy.org/science/chemistry/states-of-matt... Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.
Lecture 32 Play Video	Chilling water problem \| States of matter and intermolecular forces \| Chemistry \| Khan Academy How much ice at -10 degrees C is necessary to get 500 g of water down to 0 degrees C? Watch the next lesson: https://www.khanacademy.org/science/chemistry/states-of-matt... Missed the previous lesson? https://www.khanacademy.org/science/chemistry/states-of-matt... Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.
Lecture 33 Play Video	Phase diagrams \| States of matter and intermolecular forces \| Chemistry \| Khan Academy Understanding and interpreting phase diagrams Watch the next lesson: https://www.khanacademy.org/science/chemistry/states-of-matt... Missed the previous lesson? https://www.khanacademy.org/science/chemistry/states-of-matt... Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.
Lecture 34 Play Video	Van der Waals forces \| States of matter and intermolecular forces \| Chemistry \| Khan Academy Van der Waals forces: London dispersion forces, dipole-dipole forces, and hydrogen bonding. Watch the next lesson: https://www.khanacademy.org/science/chemistry/states-of-matt... Missed the previous lesson? https://www.khanacademy.org/science/chemistry/states-of-matt... Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.
Lecture 35 Play Video	Covalent networks, metallic crystals, and ionic crystals \| Chemistry \| Khan Academy Covalent networks, metallic crystals, and ionic crystals: Some of the strongest molecular structures. Watch the next lesson: https://www.khanacademy.org/science/chemistry/chemical-bonds... Missed the previous lesson? https://www.khanacademy.org/science/chemistry/chemical-bonds... Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.
Lecture 36 Play Video	Vapor pressure \| States of matter and intermolecular forces \| Chemistry \| Khan Academy Vapor pressure, volatility, and evaporation. Watch the next lesson: https://www.khanacademy.org/science/chemistry/states-of-matt... Missed the previous lesson? https://www.khanacademy.org/science/chemistry/states-of-matt... Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.
Lecture 37 Play Video	Suspensions, colloids and solutions \| Chemistry \| Khan Academy Suspensions, colloids and solutions. The difference between molarity and molality. Watch the next lesson: https://www.khanacademy.org/science/chemistry/states-of-matt... Missed the previous lesson? https://www.khanacademy.org/science/chemistry/states-of-matt... Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.
Lecture 38 Play Video	Solubility and intermolecular forces \| Chemistry \| Khan Academy Solubility of salt and gas solutes in liquid solvent. Watch the next lesson: https://www.khanacademy.org/science/chemistry/states-of-matt... Missed the previous lesson? https://www.khanacademy.org/science/chemistry/states-of-matt... Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.
Lecture 39 Play Video	Boiling point elevation and freezing point depression \| Chemistry \| Khan Academy Raising or lowering the boiling or freezing point of a solution by adding solute. Watch the next lesson: https://www.khanacademy.org/science/chemistry/chemical-equil... Missed the previous lesson? https://www.khanacademy.org/science/chemistry/states-of-matt... Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.
Lecture 40 Play Video	Introduction to kinetics \| Energy and enzymes \| Biology \| Khan Academy Kinetics, activation energy, activated complex and catalysts. Watch the next lesson: https://www.khanacademy.org/science/biology/energy-and-enzym... Missed the previous lesson? https://www.khanacademy.org/science/biology/energy-and-enzym... Biology on Khan Academy: Life is beautiful! From atoms to cells, from genes to proteins, from populations to ecosystems, biology is the study of the fascinating and intricate systems that make life possible. Dive in to learn more about the many branches of biology and why they are exciting and important. Covers topics seen in a high school or first-year college biology course. Subscribe to Khan Academy's Biology channel: https://www.youtube.com/channel/UC82qE46vcTn7lP4tK_RHhdg?sub...
Lecture 41 Play Video	Reactions in equilibrium \| Chemical equilibrium \| Chemistry \| Khan Academy Equilibrium reactions and constants. Created by Sal Khan. Watch the next lesson: https://www.khanacademy.org/science/chemistry/chemical-equil... Missed the previous lesson? https://www.khanacademy.org/science/chemistry/states-of-matt... Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.
Lecture 42 Play Video	Group trend for ionization energy \| Periodic table \| Chemistry \| Khan Academy Explaining trend in ionization energy down a group using concepts of nuclear charge, electron shielding, and distance of electrons from nucleus. Created by Jay. Watch the next lesson: https://www.khanacademy.org/science/chemistry/periodic-table... Missed the previous lesson? https://www.khanacademy.org/science/chemistry/periodic-table... Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.
Lecture 43 Play Video	Keq intuition \| Chemical equilibrium \| Chemistry \| Khan Academy A probabilistic look at how molecules react to develop the intuition behind the equilibrium constant formula. Not necessary to keep progressing through chemistry. Created by Sal Khan. Watch the next lesson: https://www.khanacademy.org/science/chemistry/chemical-equil... Missed the previous lesson? https://www.khanacademy.org/science/chemistry/chemical-equil... Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.
Lecture 44 Play Video	Keq derivation intuition \| Chemical equilibrium \| Chemistry \| Khan Academy A more concrete attempt at showing how the probabilities of molecules reacting is related to their concentration. Not necessary to keep progressing through chemistry. Created by Sal Khan. Watch the next lesson: https://www.khanacademy.org/science/chemistry/chemical-equil... Missed the previous lesson? https://www.khanacademy.org/science/chemistry/chemical-equil... Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.
Lecture 45 Play Video	Heterogeneous equilibrium \| Chemical equilibrium \| Chemistry \| Khan Academy Ignoring the solvent or the solid state molecules when calculating the equilibrium constant. Created by Sal Khan. Watch the next lesson: https://www.khanacademy.org/science/chemistry/chemical-equil... Missed the previous lesson? https://www.khanacademy.org/science/chemistry/chemical-equil... Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.
Lecture 46 Play Video	Le Chatelier's principle \| Chemical equilibrium \| Chemistry \| Khan Academy How Le Chatelier's Principle predicts changes in concentration when "stressing" reactions at equilibrium. Created by Sal Khan. Watch the next lesson: https://www.khanacademy.org/science/chemistry/chemical-equil... Missed the previous lesson? https://www.khanacademy.org/science/chemistry/chemical-equil... Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.
Lecture 47 Play Video	Introduction to pH, pOH, and pKw Autoionization of water into hydronium and hydroxide ions. pH, pOH, and pKa. More free lessons at: http://www.khanacademy.org/video?v=2q4vSKwaBtw
Lecture 48 Play Video	Acid Base Introduction Arrhenius, Bronsted Lowry, and Lewis Acids and Bases. More free lessons at: http://www.khanacademy.org/video?v=vShCnTY1-T0
Lecture 49 Play Video	pH, pOH of strong acids and bases \| Chemistry \| Khan Academy Deriving the relationship between pKw, pH, and pOH. Calculating the pH or pOH of strong acids and bases. Created by Sal Khan. Watch the next lesson: https://www.khanacademy.org/science/chemistry/acids-and-base... Missed the previous lesson? https://www.khanacademy.org/science/chemistry/acids-and-base... Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.
Lecture 50 Play Video	pH of a Weak Acid Calculating the pH of a weak acid More free lessons at: http://www.khanacademy.org/video?v=dencuBNp_Ck
Lecture 51 Play Video	pH of a Weak Base pH of .2 M of NH3 (weak base). More free lessons at: http://www.khanacademy.org/video?v=gDJtOIxDu78
Lecture 52 Play Video	Conjugate acids and bases Introduction to conjugate acids and bases. Created by Sal Khan. Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.
Lecture 53 Play Video	pKa and pKb relationship \| Acids and bases \| Chemistry \| Khan Academy The Ka and Kb relationship and pKa and pKb relationship between conjugate acids and bases. Created by Sal Khan. Watch the next lesson: https://www.khanacademy.org/science/chemistry/acids-and-base... Missed the previous lesson? https://www.khanacademy.org/science/chemistry/acids-and-base... Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.
Lecture 54 Play Video	Buffers and Henderson-Hasselbalch \| Chemistry \| Khan Academy Getting an intuitive understanding of buffers using le Chatelier's principle. Derivation of the Henderson-Hasselbalch equation. Created by Sal Khan. Watch the next lesson: https://www.khanacademy.org/science/chemistry/acid-base-equi... Missed the previous lesson? https://www.khanacademy.org/science/chemistry/acid-base-equi... Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.
Lecture 55 Play Video	Strong Acid Titration Strong acid titration and equivalence point More free lessons at: http://www.khanacademy.org/video?v=299o6c-Fkz4
Lecture 56 Play Video	Buffer capacity \| Buffers, titrations, and solubility equilibria \| Chemistry \| Khan Academy The definition of buffer capacity, and an example showing why it depends on the absolute concentrations of the conjugate acid and base. Watch the next lesson: https://www.khanacademy.org/science/chemistry/acid-base-equi... Missed the previous lesson? https://www.khanacademy.org/science/chemistry/acid-base-equi... Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.
Lecture 57 Play Video	Weak Acid Titration Equivalence point when titrating a weak acid More free lessons at: http://www.khanacademy.org/video?v=gbpc_JBG1F0
Lecture 58 Play Video	Private video This video is private.
Lecture 59 Play Video	Titration roundup \| Buffers, titrations, and solubility equilibria \| Chemistry \| Khan Academy Making sure you fully understand titration curves by comparing the initial pH and pH at equivalence point for different types. Created by Sal Khan. Watch the next lesson: https://www.khanacademy.org/science/chemistry/acid-base-equi... Missed the previous lesson? https://www.khanacademy.org/science/chemistry/acid-base-equi... Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.
Lecture 60 Play Video	Introduction to Oxidation States Oxidation and reduction. Oxidation states.
Lecture 61 Play Video	More on Oxidation States More practice calculating oxidation states
Lecture 62 Play Video	Hydrogen Peroxide Correction Correcting an error in the last video regarding hydrogen peroxide.
Lecture 63 Play Video	Redox Reactions Oxidation reduction (or redox) reactions
Lecture 64 Play Video	Galvanic Cells Redox reactions to drive Galvanic Cells.
Lecture 65 Play Video	Types of decay \| Nuclear chemistry \| Chemistry \| Khan Academy Alpha, Beta, Gamma Decay and Positron Emission Watch the next lesson: https://www.khanacademy.org/science/chemistry/nuclear-chemis... Missed the previous lesson? https://www.khanacademy.org/science/chemistry/nuclear-chemis... Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.
Lecture 66 Play Video	Half-life and carbon dating \| Nuclear chemistry \| Chemistry \| Khan Academy Carbon dating is a real-life example of a first-order reaction. This video explains half-life in the context of radioactive decay. Watch the next lesson: https://www.khanacademy.org/science/chemistry/nuclear-chemis... Missed the previous lesson? https://www.khanacademy.org/science/chemistry/nuclear-chemis... Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.
Lecture 67 Play Video	Exponential decay formula proof (can skip, involves calculus) \| Chemistry \| Khan Academy Showing that N(t)=Ne^(-kt) describes the amount of a radioactive substance we have at time T. For students with background in Calculus. Not necessary for intro chemistry class. Watch the next lesson: https://www.khanacademy.org/science/chemistry/nuclear-chemis... Missed the previous lesson? https://www.khanacademy.org/science/chemistry/nuclear-chemis... Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.
Lecture 68 Play Video	Introduction to exponential decay \| Nuclear chemistry \| Chemistry \| Khan Academy Introduction to Exponential Decay. Using the exponential decay formula to calculate k, calculating the mass of carbon-14 remaining after a given time, and calculating the time it takes to have a specific mass remaining . Watch the next lesson: https://www.khanacademy.org/science/chemistry/nuclear-chemis... Missed the previous lesson? https://www.khanacademy.org/science/chemistry/nuclear-chemis... Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.
Lecture 69 Play Video	More exponential decay examples \| Nuclear chemistry \| Chemistry \| Khan Academy A few more examples of exponential decay. Practice calculating k from half-life, and calculating initial mass. Watch the next lesson: https://www.khanacademy.org/science/chemistry/nuclear-chemis... Missed the previous lesson? https://www.khanacademy.org/science/chemistry/nuclear-chemis... Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.
Lecture 70 Play Video	Macrostates and microstates \| Thermodynamics \| Physics \| Khan Academy The difference between macrostates and microstates. Thermodynamic equilibrium. Created by Sal Khan. Watch the next lesson: https://www.khanacademy.org/science/physics/thermodynamics/l... Missed the previous lesson? https://www.khanacademy.org/science/physics/thermodynamics/s... Physics on Khan Academy: Physics is the study of the basic principles that govern the physical world around us. We'll start by looking at motion itself. Then, we'll learn about forces, momentum, energy, and other concepts in lots of different physical situations. To get the most out of physics, you'll need a solid understanding of algebra and a basic understanding of trigonometry. Subscribe to Khan Academy’s Physics channel: https://www.youtube.com/channel/UC0oGarQW2lE5PxhGoQAKV7Q?sub...
Lecture 71 Play Video	Quasistatic and reversible processes \| Thermodynamics \| Physics \| Khan Academy Using theoretically quasi-static and/or reversible processes to stay pretty much at equilibrium. Created by Sal Khan. Watch the next lesson: https://www.khanacademy.org/science/physics/thermodynamics/l... Missed the previous lesson? https://www.khanacademy.org/science/physics/thermodynamics/l... Physics on Khan Academy: Physics is the study of the basic principles that govern the physical world around us. We'll start by looking at motion itself. Then, we'll learn about forces, momentum, energy, and other concepts in lots of different physical situations. To get the most out of physics, you'll need a solid understanding of algebra and a basic understanding of trigonometry. Subscribe to Khan Academy’s Physics channel: https://www.youtube.com/channel/UC0oGarQW2lE5PxhGoQAKV7Q?sub...
Lecture 72 Play Video	First law of thermodynamics / internal energy \| Thermodynamics \| Physics \| Khan Academy First law of thermodynamic and internal energy. Created by Sal Khan. Watch the next lesson: https://www.khanacademy.org/science/physics/thermodynamics/l... Missed the previous lesson? https://www.khanacademy.org/science/physics/thermodynamics/l... Physics on Khan Academy: Physics is the study of the basic principles that govern the physical world around us. We'll start by looking at motion itself. Then, we'll learn about forces, momentum, energy, and other concepts in lots of different physical situations. To get the most out of physics, you'll need a solid understanding of algebra and a basic understanding of trigonometry. Subscribe to Khan Academy’s Physics channel: https://www.youtube.com/channel/UC0oGarQW2lE5PxhGoQAKV7Q?sub...
Lecture 73 Play Video	More on internal energy \| Thermodynamics \| Physics \| Khan Academy Getting more intuition of internal energy, heat, and work. Examples of using the first law to calculate work. Created by Sal Khan. Watch the next lesson: https://www.khanacademy.org/science/physics/thermodynamics/l... Missed the previous lesson? https://www.khanacademy.org/science/physics/thermodynamics/l... Physics on Khan Academy: Physics is the study of the basic principles that govern the physical world around us. We'll start by looking at motion itself. Then, we'll learn about forces, momentum, energy, and other concepts in lots of different physical situations. To get the most out of physics, you'll need a solid understanding of algebra and a basic understanding of trigonometry. Subscribe to Khan Academy’s Physics channel: https://www.youtube.com/channel/UC0oGarQW2lE5PxhGoQAKV7Q?sub...
Lecture 74 Play Video	Work from expansion \| Thermodynamics \| Physics \| Khan Academy How a system can do work by expanding. Created by Sal Khan. Watch the next lesson: https://www.khanacademy.org/science/physics/thermodynamics/l... Missed the previous lesson? https://www.khanacademy.org/science/physics/thermodynamics/l... Physics on Khan Academy: Physics is the study of the basic principles that govern the physical world around us. We'll start by looking at motion itself. Then, we'll learn about forces, momentum, energy, and other concepts in lots of different physical situations. To get the most out of physics, you'll need a solid understanding of algebra and a basic understanding of trigonometry. Subscribe to Khan Academy’s Physics channel: https://www.youtube.com/channel/UC0oGarQW2lE5PxhGoQAKV7Q?sub...
Lecture 75 Play Video	PV-diagrams and expansion work \| Thermodynamics \| Physics \| Khan Academy Why work from expansion is the area under the curve of a PV-diagram. Why heat is not a state function and internal energy is a state function. Created by Sal Khan. Watch the next lesson: https://www.khanacademy.org/science/physics/thermodynamics/l... Missed the previous lesson? https://www.khanacademy.org/science/physics/thermodynamics/l... Physics on Khan Academy: Physics is the study of the basic principles that govern the physical world around us. We'll start by looking at motion itself. Then, we'll learn about forces, momentum, energy, and other concepts in lots of different physical situations. To get the most out of physics, you'll need a solid understanding of algebra and a basic understanding of trigonometry. Subscribe to Khan Academy’s Physics channel: https://www.youtube.com/channel/UC0oGarQW2lE5PxhGoQAKV7Q?sub...
Lecture 76 Play Video	Proof: U = (3/2)PV or U = (3/2)nRT \| Thermodynamics \| Physics \| Khan Academy Conceptual proof that the internal energy of an ideal gas system is 3/2 PV. Created by Sal Khan. Watch the next lesson: https://www.khanacademy.org/science/physics/thermodynamics/l... Missed the previous lesson? https://www.khanacademy.org/science/physics/thermodynamics/l... Physics on Khan Academy: Physics is the study of the basic principles that govern the physical world around us. We'll start by looking at motion itself. Then, we'll learn about forces, momentum, energy, and other concepts in lots of different physical situations. To get the most out of physics, you'll need a solid understanding of algebra and a basic understanding of trigonometry. Subscribe to Khan Academy’s Physics channel: https://www.youtube.com/channel/UC0oGarQW2lE5PxhGoQAKV7Q?sub...
Lecture 77 Play Video	Work done by isothermic process \| Thermodynamics \| Physics \| Khan Academy Isothermic and adiabatic processes. Calculating the work done by an isothermic process and seeing that it is the same as the heat added. Created by Sal Khan. Watch the next lesson: https://www.khanacademy.org/science/physics/thermodynamics/l... Missed the previous lesson? https://www.khanacademy.org/science/physics/thermodynamics/l... Physics on Khan Academy: Physics is the study of the basic principles that govern the physical world around us. We'll start by looking at motion itself. Then, we'll learn about forces, momentum, energy, and other concepts in lots of different physical situations. To get the most out of physics, you'll need a solid understanding of algebra and a basic understanding of trigonometry. Subscribe to Khan Academy’s Physics channel: https://www.youtube.com/channel/UC0oGarQW2lE5PxhGoQAKV7Q?sub...
Lecture 78 Play Video	Carnot cycle and Carnot engine \| Thermodynamics \| Physics \| Khan Academy Introduction to the Carnot cycle and Carnot heat engine. Created by Sal Khan. Watch the next lesson: https://www.khanacademy.org/science/physics/thermodynamics/l... Missed the previous lesson? https://www.khanacademy.org/science/physics/thermodynamics/l... Physics on Khan Academy: Physics is the study of the basic principles that govern the physical world around us. We'll start by looking at motion itself. Then, we'll learn about forces, momentum, energy, and other concepts in lots of different physical situations. To get the most out of physics, you'll need a solid understanding of algebra and a basic understanding of trigonometry. Subscribe to Khan Academy’s Physics channel: https://www.youtube.com/channel/UC0oGarQW2lE5PxhGoQAKV7Q?sub...
Lecture 79 Play Video	Proof: Volume ratios in a carnot cycle \| Thermodynamics \| Physics \| Khan Academy Proof of the volume ratios in a Carnot cycle. Created by Sal Khan. Watch the next lesson: https://www.khanacademy.org/science/physics/thermodynamics/l... Missed the previous lesson? https://www.khanacademy.org/science/physics/thermodynamics/l... Physics on Khan Academy: Physics is the study of the basic principles that govern the physical world around us. We'll start by looking at motion itself. Then, we'll learn about forces, momentum, energy, and other concepts in lots of different physical situations. To get the most out of physics, you'll need a solid understanding of algebra and a basic understanding of trigonometry. Subscribe to Khan Academy’s Physics channel: https://www.youtube.com/channel/UC0oGarQW2lE5PxhGoQAKV7Q?sub...
Lecture 80 Play Video	Proof: S (or entropy) is a valid state variable \| Thermodynamics \| Physics \| Khan Academy Proof that S (or entropy) is a valid state variable. Created by Sal Khan. Watch the next lesson: https://www.khanacademy.org/science/physics/thermodynamics/l... Missed the previous lesson? https://www.khanacademy.org/science/physics/thermodynamics/l... Physics on Khan Academy: Physics is the study of the basic principles that govern the physical world around us. We'll start by looking at motion itself. Then, we'll learn about forces, momentum, energy, and other concepts in lots of different physical situations. To get the most out of physics, you'll need a solid understanding of algebra and a basic understanding of trigonometry. Subscribe to Khan Academy’s Physics channel: https://www.youtube.com/channel/UC0oGarQW2lE5PxhGoQAKV7Q?sub...
Lecture 81 Play Video	Thermodynamic entropy definition clarification \| Physics \| Khan Academy Clarifying that the thermodynamic definition of Entropy requires a reversible system. Created by Sal Khan. Watch the next lesson: https://www.khanacademy.org/science/physics/thermodynamics/l... Missed the previous lesson? https://www.khanacademy.org/science/physics/thermodynamics/l... Physics on Khan Academy: Physics is the study of the basic principles that govern the physical world around us. We'll start by looking at motion itself. Then, we'll learn about forces, momentum, energy, and other concepts in lots of different physical situations. To get the most out of physics, you'll need a solid understanding of algebra and a basic understanding of trigonometry. Subscribe to Khan Academy’s Physics channel: https://www.youtube.com/channel/UC0oGarQW2lE5PxhGoQAKV7Q?sub...
Lecture 82 Play Video	Reconciling thermodynamic and state definitions of entropy \| Physics \| Khan Academy Long video explaining why entropy is a measure of the number of states a system can take on (mathy, but mind-blowing). Created by Sal Khan. Watch the next lesson: https://www.khanacademy.org/science/physics/thermodynamics/l... Missed the previous lesson? https://www.khanacademy.org/science/physics/thermodynamics/l... Physics on Khan Academy: Physics is the study of the basic principles that govern the physical world around us. We'll start by looking at motion itself. Then, we'll learn about forces, momentum, energy, and other concepts in lots of different physical situations. To get the most out of physics, you'll need a solid understanding of algebra and a basic understanding of trigonometry. Subscribe to Khan Academy’s Physics channel: https://www.youtube.com/channel/UC0oGarQW2lE5PxhGoQAKV7Q?sub...
Lecture 83 Play Video	Entropy intuition \| Thermodynamics \| Physics \| Khan Academy Introduces second law of thermodynamics. A discussion of entropy change in terms of heat and microstates . Created by Sal Khan. Watch the next lesson: https://www.khanacademy.org/science/physics/thermodynamics/l... Missed the previous lesson? https://www.khanacademy.org/science/physics/thermodynamics/l... Physics on Khan Academy: Physics is the study of the basic principles that govern the physical world around us. We'll start by looking at motion itself. Then, we'll learn about forces, momentum, energy, and other concepts in lots of different physical situations. To get the most out of physics, you'll need a solid understanding of algebra and a basic understanding of trigonometry. Subscribe to Khan Academy’s Physics channel: https://www.youtube.com/channel/UC0oGarQW2lE5PxhGoQAKV7Q?sub...
Lecture 84 Play Video	Maxwell's demon \| Thermodynamics \| Physics \| Khan Academy Maxwell's Demon: A thought experiment that seems to defy the 2nd Law of Thermodynamics. Created by Sal Khan. Watch the next lesson: https://www.khanacademy.org/science/physics/thermodynamics/l... Missed the previous lesson? https://www.khanacademy.org/science/physics/thermodynamics/l... Physics on Khan Academy: Physics is the study of the basic principles that govern the physical world around us. We'll start by looking at motion itself. Then, we'll learn about forces, momentum, energy, and other concepts in lots of different physical situations. To get the most out of physics, you'll need a solid understanding of algebra and a basic understanding of trigonometry. Subscribe to Khan Academy’s Physics channel: https://www.youtube.com/channel/UC0oGarQW2lE5PxhGoQAKV7Q?sub...
Lecture 85 Play Video	More on entropy \| Thermodynamics \| Physics \| Khan Academy Distinguishing between microstates and macro states. How entropy S is defined for a system and not for a specific microstate. Created by Sal Khan. Watch the next lesson: https://www.khanacademy.org/science/physics/thermodynamics/l... Missed the previous lesson? https://www.khanacademy.org/science/physics/thermodynamics/l... Physics on Khan Academy: Physics is the study of the basic principles that govern the physical world around us. We'll start by looking at motion itself. Then, we'll learn about forces, momentum, energy, and other concepts in lots of different physical situations. To get the most out of physics, you'll need a solid understanding of algebra and a basic understanding of trigonometry. Subscribe to Khan Academy’s Physics channel: https://www.youtube.com/channel/UC0oGarQW2lE5PxhGoQAKV7Q?sub...
Lecture 86 Play Video	Efficiency of a Carnot engine \| Thermodynamics \| Physics \| Khan Academy Definition of efficiency for a heat engine. Efficiency of a Carnot Engine. Created by Sal Khan. Watch the next lesson: https://www.khanacademy.org/science/physics/thermodynamics/l... Missed the previous lesson? https://www.khanacademy.org/science/physics/thermodynamics/l... Physics on Khan Academy: Physics is the study of the basic principles that govern the physical world around us. We'll start by looking at motion itself. Then, we'll learn about forces, momentum, energy, and other concepts in lots of different physical situations. To get the most out of physics, you'll need a solid understanding of algebra and a basic understanding of trigonometry. Subscribe to Khan Academy’s Physics channel: https://www.youtube.com/channel/UC0oGarQW2lE5PxhGoQAKV7Q?sub...
Lecture 87 Play Video	Carnot efficiency 2: Reversing the cycle \| Thermodynamics \| Physics \| Khan Academy Seeing how we can scale and or reverse a Carnot Engine (to make a refrigerator). Created by Sal Khan. Watch the next lesson: https://www.khanacademy.org/science/physics/thermodynamics/l... Missed the previous lesson? https://www.khanacademy.org/science/physics/thermodynamics/l... Physics on Khan Academy: Physics is the study of the basic principles that govern the physical world around us. We'll start by looking at motion itself. Then, we'll learn about forces, momentum, energy, and other concepts in lots of different physical situations. To get the most out of physics, you'll need a solid understanding of algebra and a basic understanding of trigonometry. Subscribe to Khan Academy’s Physics channel: https://www.youtube.com/channel/UC0oGarQW2lE5PxhGoQAKV7Q?sub...
Lecture 88 Play Video	Carnot efficiency 3: Proving that it is the most efficient \| Physics \| Khan Academy Proving that a Carnot Engine is the most efficient engine. Created by Sal Khan. Watch the next lesson: https://www.khanacademy.org/science/physics/electric-charge-... Missed the previous lesson? https://www.khanacademy.org/science/physics/thermodynamics/l... Physics on Khan Academy: Physics is the study of the basic principles that govern the physical world around us. We'll start by looking at motion itself. Then, we'll learn about forces, momentum, energy, and other concepts in lots of different physical situations. To get the most out of physics, you'll need a solid understanding of algebra and a basic understanding of trigonometry. Subscribe to Khan Academy’s Physics channel: https://www.youtube.com/channel/UC0oGarQW2lE5PxhGoQAKV7Q?sub...
Lecture 89 Play Video	Enthalpy \| Thermodynamics \| Chemistry \| Khan Academy Understanding why enthalpy can be viewed as "heat content" in a constant pressure system. Created by Sal Khan. Watch the next lesson: https://www.khanacademy.org/science/chemistry/thermodynamics... Missed the previous lesson? https://www.khanacademy.org/science/chemistry/thermodynamics... Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.
Lecture 90 Play Video	Heat of formation \| Thermodynamics \| Chemistry \| Khan Academy Standard heat of formation or standard enthalpy change of formation. How heats of formation are calculated. Created by Sal Khan. Watch the next lesson: https://www.khanacademy.org/science/chemistry/thermodynamics... Missed the previous lesson? https://www.khanacademy.org/science/chemistry/thermodynamics... Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.
Lecture 91 Play Video	Hess's law and reaction enthalpy change \| Chemistry \| Khan Academy Using Hess's Law and standard heats of formation to determine the enthalpy change for reactions. Created by Sal Khan. Watch the next lesson: https://www.khanacademy.org/science/chemistry/thermodynamics... Missed the previous lesson? https://www.khanacademy.org/science/chemistry/thermodynamics... Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.
Lecture 92 Play Video	Gibbs free energy and spontaneity \| Chemistry \| Khan Academy Intuition behind why spontaneity is driven by enthalpy, entropy and temperature. Introduction to Gibbs free energy. Created by Sal Khan. Watch the next lesson: https://www.khanacademy.org/science/chemistry/thermodynamics... Missed the previous lesson? https://www.khanacademy.org/science/chemistry/thermodynamics... Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.
Lecture 93 Play Video	Gibbs free energy example \| Thermodynamics \| Chemistry \| Khan Academy Determining if a reaction is spontaneous by calculating the change in Gibbs free energy. Also calculates the change in entropy using table of standard entropies. Created by Sal Khan. Watch the next lesson: https://www.khanacademy.org/science/chemistry/thermodynamics... Missed the previous lesson? https://www.khanacademy.org/science/chemistry/thermodynamics... Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.
Lecture 94 Play Video	More rigorous Gibbs free energy / spontaneity relationship \| Chemistry \| Khan Academy More formal understanding of why a negative change in Gibbs Free Energy implies a spontaneous, irreversible reaction. Created by Sal Khan. Watch the next lesson: https://www.khanacademy.org/science/chemistry/thermodynamics... Missed the previous lesson? https://www.khanacademy.org/science/chemistry/thermodynamics... Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.
Lecture 95 Play Video	A look at a seductive but wrong Gibbs/spontaneity proof \| Chemistry \| Khan Academy A look at why the "proof" of the relation between changes in Gibbs Free Energy and Spontaneity is wrong in many textbooks. Created by Sal Khan. Watch the next lesson: https://www.khanacademy.org/science/chemistry/thermodynamics... Missed the previous lesson? https://www.khanacademy.org/science/chemistry/thermodynamics... Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.
Lecture 96 Play Video	Stoichiometry example problem 1 \| Chemistry \| Khan Academy Figuring out grams of reactants and product produced from reaction of phosphorous and chlorine. Created by Sal Khan. Watch the next lesson: https://www.khanacademy.org/science/chemistry/chemical-react... Missed the previous lesson? https://www.khanacademy.org/science/chemistry/chemical-react... Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.
Lecture 97 Play Video	Stoichiometry example problem 2 \| Chemistry \| Khan Academy Calculating mass of oxygen needed and grams of product formed from the combustion of 25.0 g of glucose. Created by Sal Khan. Practice this yourself on Khan Academy right now: https://www.khanacademy.org/science/chemistry/chemical-react... Watch the next lesson: https://www.khanacademy.org/science/chemistry/chemical-react... Missed the previous lesson? https://www.khanacademy.org/science/chemistry/chemical-react... Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.
Lecture 98 Play Video	Limiting reactant example problem 1 \| Chemistry \| Khan Academy A limiting reagent problem to calculate mass of product and mass of excess reactant leftover after reaction. Created by Sal Khan. Practice this yourself on Khan Academy right now: https://www.khanacademy.org/science/chemistry/chemical-react... Watch the next lesson: https://www.khanacademy.org/science/chemistry/chemical-react... Missed the previous lesson? https://www.khanacademy.org/science/chemistry/chemical-react... Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.
Lecture 99 Play Video	Empirical and Molecular Formulas from Stoichiometry Empirical and Molecular Formulas from Stoichiometry More free lessons at: http://www.khanacademy.org/video?v=FycJ8X67xEU
Lecture 100 Play Video	Example of Finding Reactant Empirical Formula Example of Finding Reactant Empirical Formula More free lessons at: http://www.khanacademy.org/video?v=66ziUq6vRko
Lecture 101 Play Video	Stoichiometry of a Reaction in Solution Stoichiometry of a Reaction in Solution More free lessons at: http://www.khanacademy.org/video?v=EKZSwjVR594
Lecture 102 Play Video	Another Stoichiometry Example in a Solution Another Stoichiometry Example in a Solution More free lessons at: http://www.khanacademy.org/video?v=_qrQKBB2jt8
Lecture 103 Play Video	Molecular and Empirical Forumlas from Percent Composition Molecular and Empirical Forumlas from Percent Composition. Example 2.9 from Kotz Chemistry book More free lessons at: http://www.khanacademy.org/video?v=_H009sTvYE0
Lecture 104 Play Video	Acid base titration example \| Chemistry \| Khan Academy Using acid-base titration to find mass of oxalic acid, a weak acid. Created by Sal Khan. Watch the next lesson: https://www.khanacademy.org/science/chemistry/acid-base-equi... Missed the previous lesson? https://www.khanacademy.org/science/chemistry/acid-base-equi... Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.
Lecture 105 Play Video	Spectrophotometry introduction \| Kinetics \| Chemistry \| Khan Academy Spectrophotometry, transmittance, absorbance and the Beer-Lambert Law. Created by Sal Khan. Watch the next lesson: https://www.khanacademy.org/science/chemistry/chem-kinetics/... Missed the previous lesson? https://www.khanacademy.org/science/chemistry/chem-kinetics/... Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.
Lecture 106 Play Video	Spectrophotometry example \| Kinetics \| Chemistry \| Khan Academy Spectrophotometry Example - determining concentration based on absorbance. Created by Sal Khan. Watch the next lesson: https://www.khanacademy.org/science/chemistry/nuclear-chemis... Missed the previous lesson? https://www.khanacademy.org/science/chemistry/chem-kinetics/... Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.
Lecture 107 Play Video	Hess's law example \| Thermodynamics \| Chemistry \| Khan Academy Hess's law example. Created by Sal Khan. Watch the next lesson: https://www.khanacademy.org/science/chemistry/thermodynamics... Missed the previous lesson? https://www.khanacademy.org/science/chemistry/thermodynamics... Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.
Lecture 108 Play Video	Vapor pressure example \| Chemistry \| Khan Academy Vapor pressure example using the ideal gas law. Created by Sal Khan. Watch the next lesson: https://www.khanacademy.org/science/chemistry/states-of-matt... Missed the previous lesson? https://www.khanacademy.org/science/chemistry/gases-and-kine... Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.
Lecture 109 Play Video	Change of state example \| States of matter and intermolecular forces \| Chemistry \| Khan Academy Specific heat capacity and enthalpy of vaporization example: calculating how much energy it takes to vaporize 1.00 kg of ethanol starting from 20 degrees C. Watch the next lesson: https://www.khanacademy.org/science/chemistry/states-of-matt... Missed the previous lesson? https://www.khanacademy.org/science/chemistry/states-of-matt... Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.
Lecture 110 Play Video	Small x approximation for small Kc \| Chemistry \| Khan Academy When the small x approximation is useful for solving equilibrium problems, and an example using the small x approximation when Kc is small. Watch the next lesson: https://www.khanacademy.org/science/chemistry/chemical-equil... Missed the previous lesson? https://www.khanacademy.org/science/chemistry/chemical-equil... Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.
Lecture 111 Play Video	Small x approximation for large Kc \| Chemical equilibrium \| Chemistry \| Khan Academy Guidelines and worked examples for using the small x approximation to solve equilibrium problems with large Kc values. Watch the next lesson: https://www.khanacademy.org/science/chemistry/chemical-equil... Missed the previous lesson? https://www.khanacademy.org/science/chemistry/chemical-equil... Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.
Lecture 112 Play Video	pH and pKa relationship for buffers \| Chemistry \| Khan Academy How the Henderson-Hasselbalch equation can be used to look at the ratio of conjugate acid and base using relationship between buffer pH and pKa. Watch the next lesson: https://www.khanacademy.org/science/chemistry/acid-base-equi... Missed the previous lesson? https://www.khanacademy.org/science/chemistry/acid-base-equi... Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.
Lecture 113 Play Video	2015 AP chemistry free response 5a Finding the order of reaction for kinetics of bleaching food coloring. An alternative method of solving 2015 AP Chemistry free response 5a.
Lecture 114 Play Video	AP Chemistry multiple choice sample: Boiling points Comparing the boiling point of nonane and 2,3,4-trifluoropentane. A sample multiple choice problem from the 2014 AP course description.
Lecture 115 Play Video	Rate constant k from half-life example \| Knetics \| Chemistry \| Khan Academy Example problem showing how to find the rate constant k from the half-life of a first order reaction. Watch the next lesson: https://www.khanacademy.org/science/chemistry/chem-kinetics/... Missed the previous lesson? https://www.khanacademy.org/science/chemistry/chem-kinetics/... Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.
Lecture 116 Play Video	Ways to get a buffer solution \| Chemistry \| Khan Academy Describes the two main situations where you get a buffer: making a buffer for a specific pH by combining a weak acid and a salt containing the conjugate base, and using a neutralization reaction by combining a weak acid and a strong base. Watch the next lesson: https://www.khanacademy.org/science/chemistry/acid-base-equi... Missed the previous lesson? https://www.khanacademy.org/science/chemistry/acid-base-equi... Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.
Lecture 117 Play Video	Comparing Q vs K example \| Chemical equilibrium \| Chemistry \| Khan Academy A worked example using reaction quotient Q to predict how concentrations will shift so the reaction can get to equilibrium. Watch the next lesson: https://www.khanacademy.org/science/chemistry/acids-and-base... Missed the previous lesson? https://www.khanacademy.org/science/chemistry/chemical-equil... Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.
Lecture 118 Play Video	Finding units of rate constant k \| Knetics \| Chemistry \| Khan Academy How to find the units for the rate constant k for a zero, first, or second order reaction. Watch the next lesson: https://www.khanacademy.org/science/chemistry/chem-kinetics/... Missed the previous lesson? https://www.khanacademy.org/science/chemistry/chem-kinetics/... Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.
Lecture 119 Play Video	Calculating internal energy and work example \| Chemistry \| Khan Academy Worked example calculating the change in internal energy for a gas using the first law of thermodynamics. Watch the next lesson: https://www.khanacademy.org/science/chemistry/thermodynamics... Missed the previous lesson? https://www.khanacademy.org/science/chemistry/thermodynamics... Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.
Lecture 120 Play Video	Ionic bonds and Coulombs law Introduction to how the strength of ionic bonds is related to Coulomb's law. Example of using Coulomb's law to explain differences in melting points of ionic compounds.
Lecture 121 Play Video	Bond enthalpy and enthalpy of reaction \| Chemistry \| Khan Academy Introduction to bond enthalpy, and how to use bond enthalpies to calculate enthalpy of reaction. Watch the next lesson: https://www.khanacademy.org/science/chemistry/thermodynamics... Missed the previous lesson? https://www.khanacademy.org/science/chemistry/thermodynamics... Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.
Lecture 122 Play Video	Introduction to reaction quotient Qc \| Chemical equilibrium \| Chemistry \| Khan Academy Introduction to the reaction quotient Qc, and how to use the reaction quotient to predict how the reaction concentrations will change. Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful. Subscribe to Khan AcademyÃ¢ÂÂs Chemistry channel: https://www.youtube.com/channel/UCyEot66LrwWFEMONvrIBh3A?sub...
Lecture 123 Play Video	Le Chatelier's principle: Worked example \| Chemical equilibrium \| Chemistry \| Khan Academy A worked example using Le Chatelier's principle to predict how concentrations will shift for different perturbations. Example includes changes in reaction vessel volume, changing amount of solid product, adding inert gas, and adding a catalyst. Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.
Lecture 124 Play Video	Conjugate acid-base pairs \| Acids and bases \| Chemistry \| Khan Academy Introduction to conjugate acid-base pairs. Definition and examples of conjugate acid-base pairs. Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.