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Turning copper coins into ‘silver’ and ‘gold’
In association with Nuffield Foundation
Source: © Shutterstock
Perform what looks like alchemy with ordinary copper coins in this teacher demonstration. Includes kit list and safety instructions.
In this teacher demonstration, students observe a copper coin as it is dipped into a solution of sodium zincate in contact with zinc metal. The coin becomes plated with zinc, appearing silver in colour.
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