AP Chemistry with Chemguy

Video Lectures

Displaying all 35 video lectures.
I. Atomic Theory
Lecture 1
Atomic Theory I: Energy and Waves
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Atomic Theory I: Energy and Waves
In this video lecture, Chemguy begins with energy, waves, and Planck's constant. He explains the universal wave equation, Planck's equation for the energy of a wave and Eistein's most famous equation: the mass-energy equivalence formula.
Lecture 2
Atomic Theory II: Bohr Model
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Atomic Theory II: Bohr Model
In this video lecture, Chemguy explains energy levels; Bohr calculation for energy of electron.
Lecture 3
Atomic Theory III: Heisenberg Uncertainty Principle
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Atomic Theory III: Heisenberg Uncertainty Principle
In this video lecture, Chemguy explains the Heisenberg Uncertainty Principle.
Lecture 4
Atomic Theory IV: Pauli Exclusion Principle
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Atomic Theory IV: Pauli Exclusion Principle
In this video lecture, Chemguy teaches quantum numbers and Pauli's exclusion principle. There are 4 quantum numbers: n (Principle Quantum Number), l (Angular Momentum Quantum Number), ml (Magnetic Quantum Number) and ms (Spin Quantum Number) Pauli's exclusion principles states that no two electrons in an atom can have the same set of quantum numbers.
Lecture 5
Atomic Theory V: Example of Quantum Numbers
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Atomic Theory V: Example of Quantum Numbers
In this video lecture, Chemguy finishes his lesson on quantum number lesson.
Lecture 6
Atomic Theory VI: Electron Configurations & Aufbau Principle
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Atomic Theory VI: Electron Configurations & Aufbau Principle
In this video lecture, Chemguy explains how to find the electron configurations on elements and the Aufbau principle. He also discusses how the different orbitals can be found in the periodic table.
Lecture 7
Atomic Theory VII: Periodic Trends
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Atomic Theory VII: Periodic Trends
In this video lecture, Chemguy finishes electron configurations and takes up periodic table trends. He covers essential periodic table trends, such as Ionization Energy, Electron Affinity, Electronegativity and Atomic Radius.

- First Ionization Energy: the energy required to take away the outermost electron. As you go from left to right on the periodic table, the first ionization energy increases. As you go from top to bottom, the first ionization energy decreases.
- Electron Affinity: is the energy associated with the acquiring of an electron by a gaseous element. "How favorable is it to bring in an electron?" Electron affinity increases from going left to right on the periodic table.
- Atomic radius decreases across a row in the periodic table and increases from top to bottom in a column.
II. Bonding
Lecture 8
Bonding I: Lattice Energy
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Bonding I: Lattice Energy
In this video lecture, Chemguy teaches the step-wise formation of an ionic compound and the lattice energy of molecules. He also mentions Coulomb's Law briefly near the end of the lecture.
Lecture 9
Bonding II: Formal Charge & Resonance
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Bonding II: Formal Charge & Resonance
In this video lecture, Chemguy instructs on formal charge calculation and resonance.

Some definitions discussed in this lesson:
- Format Change = Free atom valence - Assigned valence.
- All formal charges in molecule must total the overall charge.
- The more electronegative element, like oxygen, must have the lower formal charge.
Lecture 10
Bonding III: Trigonal Bipyramidal, Seesaw and T-Shape
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Bonding III: Trigonal Bipyramidal, Seesaw and T-Shape
In this video lecture, Chemguy gives the shapes for 5 effective pair: trigonal bipyramidal, seesaw shape and T-shape. When there are no lone pairs, the trigonal bipyramidal shape is found. One lone electron pair makes a seesaw shape and a T-shape when there are two lone electron pairs.
Lecture 11
Bonding IV: Octahedral and Square Planar
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Bonding IV: Octahedral and Square Planar
In this video lecture, Chemguy gives all the shapes for 6 effective pairs: octahedral and square planar shape.
Lecture 12
Bonding V: Molecular Orbitals
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Bonding V: Molecular Orbitals
In this video lecture, Chemguy teaches molecular orbitals. Topics include pi-bonds, sigma-bonds and hybridization.
Lecture 13
Bonding VI: Orbital Hybridization
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Bonding VI: Orbital Hybridization
In this video lecture, Chemguy teaches bond hybridization.
III. Stoichiometry
Lecture 14
Stoichiometry I: Molar Mass & Mass Percent Calculation
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Stoichiometry I: Molar Mass & Mass Percent Calculation
In this video lecture, Chemguy teaches the atomic weight (molar mass) calculation and mass percent.
Lecture 15
Stoichiometry II: Percent Composition by Mass & Empirical Formula
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Stoichiometry II: Percent Composition by Mass & Empirical Formula
In this video lecture, Chemguy does a question that converts % composition by mass into an empirical formula.
Lecture 16
Stoichiometry III: Water of Hydration Calculation
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Stoichiometry III: Water of Hydration Calculation
In this video lecture, Chemguy calculates the water of hydration (crystallization) of an ionic compound.
Lecture 17
Stoichiometry III/ Solutions I: Determining Empirical Formula & Advanced Solutions
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Stoichiometry III/ Solutions I: Determining Empirical Formula & Advanced Solutions
In this video lecture, Chemguy finishes the combustion analysis question to obtain the empirical formula of the compound. He also introduces advanced solution calculations involving mass percent, molality and mole fraction.
Lecture 18
Solutions II: Finding Mass %, Mole Fraction & Molality
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Solutions II: Finding Mass %, Mole Fraction & Molality
In this video lecture, Chemguy teaches molarity, mass percent and mole fraction.
Lecture 19
Solutions III: Tyndal Effect, Boiling Point and Freezing Point
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Solutions III: Tyndal Effect, Boiling Point and Freezing Point
In this video lecture, Chemguy teaches about colloids, colligative properties, Tyndal effect, boiling point elevation and freezing point depression.
Lecture 20
Solution IV: Raoult's Law
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Solution IV: Raoult's Law
Chemguy goes over pressure fraction and Raoult's Law.
Lecture 21
Solubility Product I: Molar Solubility & Ksp
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Solubility Product I: Molar Solubility & Ksp
In this video lecture, Chemguy describes molar solubility and Ksp. Topics include: equilibrium, equilibrium product constant and ICE tables.
Lecture 22
Solubility Product II: Relative Solubility
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Solubility Product II: Relative Solubility
In this video lecture, Chemguy teaches relative solubility and goes over a real tough complex ion formation problem.
IV. Gases
Lecture 23
Gases I: Kinetic Molecular Theory
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Gases I: Kinetic Molecular Theory
In this video lecture, Chemguy reviews root mean square velocity and kinetic molecular theory.
Lecture 24
Gases II: Graham's Law of Effusion
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Gases II: Graham's Law of Effusion
In this video lecture, Chemguy teaches Graham's Law of Effusion.
V. Kinetics
Lecture 25
Kinetics I: Rate Laws
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Kinetics I: Rate Laws
In this video lecture, Chemguy introduces rates of reaction; rate laws.
Lecture 26
Kinetics II: Determining Rate Law of Reaction
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Kinetics II: Determining Rate Law of Reaction
In this video lecture, Chemguy introduces the initial rate method for determining reactant order.
Lecture 27
Kinetics III: Integrated Rate Law in 0th, 1st and 2nd Order
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Kinetics III: Integrated Rate Law in 0th, 1st and 2nd Order
In this video lecture, Chemguy takes you through the integrated rate law method; zero, first and second order.
Lecture 28
Kinetics IV: Graphing Integrated Rate Law Data
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Kinetics IV: Graphing Integrated Rate Law Data
In this video lecture, Chemguy graphs integrated rate law data.
Lecture 29
Kinetics V: Reaction Mechanisms
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Kinetics V: Reaction Mechanisms
In this video lecture, Chemguy goes over reaction mechanisms.
Lecture 30
Kinetics VI: Activation Energy
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Kinetics VI: Activation Energy
In this video lecture, Chemguy finishes reaction mechanisms and introduces activation energy calculations.
VI. Thermodynamics
Lecture 31
Thermodynamics I: Entropy
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Thermodynamics I: Entropy
In this video lecture, Chemguy talks about entropy and what spontaneous reactions have in common.
Lecture 32
Thermodynamics II: Spontaneous Reaction
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Thermodynamics II: Spontaneous Reaction
In this video lecture, Chemguy discusses spontaneity, system, surrounding and change in entropy of the universe.
Lecture 33
Thermodynamics III: Gibbs Free Energy
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Thermodynamics III: Gibbs Free Energy
In this video lecture, Chemguy introduces and calculates Gibbs free energy.
Lecture 34
Thermodynamics IV: Free Energy Calculations
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Thermodynamics IV: Free Energy Calculations
In this video lecture, Chemguy teaches more free energy calculations and the Hess' Law form of the calculation of delta G: delta G(Products) - delta G (Reactants) = delta G.
Lecture 35
Thermodynamics V: Nernst Equation
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Thermodynamics V: Nernst Equation
In this video lecture, Chemguy shows the relationship between free energy and the equilibrium constant; Nernst equation.