Quote:
Originally posted by Chupes
Or someone could have put the penny in sodium hydroxide solution with granular zinc, heated it, and voila! If they would have heated it out of the sodium hydroxide a second time it would have become golden. What happened was the first heating the penny was coated in zinc, the second heating the zinc and original copper coating combine to form the alloy brass. Simple high school chemistry :P
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Exactly, we did this in an experiment in high school.
