In the refining of silver, the recovery of silver from silver nitrate solution involved displacement by copper metal. Write down the reaction involved.

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Solution

The silver nitrate is in solution and the metallic copper will dissolve to form copper nitrate; as it does, it will precipitate the silver in solution as metallic silver. That is, copper is exchanged for the silver in solution and silver is replaced by the copper that is not in solution.
The following chemical reaction is involved:

$2 {A g N O_{3}}_{(a q)} + {C u}_{(s)} \to 2 {A g}_{(s)} + {C u (N O_{3})_{2}}_{(a q)}$

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