Right, remind me to get a beaker out when I get to work. Taking in some citric acid and an older, all-copper 2 Pence piece.
I predict a very bright pinkish penny
Indeed. Approx 10% solution by weight in hot water. Within seconds, the copper oxide dissolved off. Now going to leave it all day and see if it dissolves the copper itself.
@Stonehedge started
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Right, remind me to get a beaker out when I get to work. Taking in some citric acid and an older, all-copper 2 Pence piece.