Balancing redox equations – the electron balance method

ChemistryReactions & RedoxAges 15–16

Step by step: assign oxidation numbers to each element, find which ones gain or lose electrons, write the oxidation and reduction half-reactions, then multiply them so the electrons lost equal the electrons gained (an animation shows electrons moving from the reducing agent to the oxidizing agent), and finally place the coefficients into the full equation. Students pick a textbook reaction and click Next step, or let it run automatically.