Describe how the suspects used the chemicals found at the crime scene to make the copper coins look silver.

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30-11-2021
Chemistry

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Describe how the suspects used the chemicals found at the crime scene to make the copper coins look silver.

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adioabiola adioabiola · Answer 1 · 2021-12-10T02:56:59+01:00

The chemicals found at the crime scene although not mentioned must be Sodium zincate.

Discussion:

An interesting demonstration to show plating and alloys is the conversion of copper coins to silver look-alike coins.

A 'copper' coin when dipped into a solution of sodium zincate in contact with zinc. The coin is plated with zinc and appears silver in colour.

This is a common chemistry classroom trick.