| 65 | 65 | * What happened: the citric acid in the lemon juice reacts with the copper and the zinc: the Zinc reaction releases electrons (oxidation) and the Copper reaction consumes electrons (reduction). If you've taken chemistry, you've learned about ''redox'' reactions; to see this in more detail watch [https://www.youtube.com/watch?v=Rt7-VrmZuds this 9 minute video]. If a conductive path (circuit) exists from the Zinc anode to the Copper cathode, as electrons flow through the circuit, they allow the redox reaction to proceed, and you can use the flowing electrons (electricity) to do work! |
