The Iron/Sulfur mixture flares up and a porous, black substance is created, Iron Sulphide. Generally liked but not always successful is the magnetic test of the Iron Sulphide. Small, non-reactive Iron particles are still attracted to a magnet. The creation of the Iron Sulphide was made visible in the test tube by a glow, caused by the exothermic quality of this reaction.



Oxidization: Fe -> Fe2+ +2e-



Reduction: S + 2e- -> S2-



Fe +S -> FeS



You can learn more about this reaction here: http://www.science-tube.com/index.php?c=chemie§ion=065

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Added: 15 years ago.
Topic: Chemical Reactions