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Question

A copper coin is kept immersed in a solution of silver nitrate for some time. What will happoen to the coin and the colour of the solution?
 


Solution

Copper metal is more reactive than silver metal. Thus, when the copper coin is kept immersed in silver nitrate solution for some time, it displaces silver from silver nitrate solution.

Cu+2AgNO3Cu(NO3)2+2Ag

The grey solid crystal of Ag metal are seen growing on the copper coin and solution turns blue in colour.

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