Unit 5 · 4 lessons
Electrochemistry
Redox reactions move electrons from one substance to another. Keep track of those electrons and you can balance any redox equation, build a battery, predict whether a reaction will happen, and explain electroplating and rust.
- 35 practice questions
- 32 flashcards
- 1 interactive lesson
Lessons
- 1Oxidation Numbers and Redox ReactionsRedox reactions as electron transfer, the rules for assigning oxidation numbers, identifying what is oxidized and reduced and the oxidizing and reducing agents, and balancing equations by the oxidation-number method.9 questions
- 2Balancing Redox with Half-ReactionsSplitting a redox reaction into an oxidation half-reaction and a reduction half-reaction, balancing each for atoms and charge, and combining them. Includes the extra steps for reactions in acidic and in basic solution.9 questions
- 3Galvanic Cells and Cell PotentialHow separating the two half-reactions of a spontaneous redox reaction produces electric current, the parts of a galvanic cell, cell notation, the standard hydrogen electrode, calculating standard cell potential from reduction potentials, and using it to predict spontaneity.Interactive9 questions
- 4Electrolytic Cells, Corrosion and BatteriesUsing electrical energy to force non-spontaneous redox reactions (electrolysis of molten salts and water, refining and electroplating), corrosion of iron as an electrochemical cell and how to prevent it, and how batteries and fuel cells work, including safe disposal.8 questions