Question

What happens when a piece of zinc metal is added to a copper sulphate solution?
Write the balanced chemical equation for the reaction.

Answer 1

When a piece of zinc metal is added to copper sulphate solution, zinc replaces copper from the solution, resulting in the formation of zinc sulphate, along with copper.​
The colour of the solution changes from blue to colourless, and a reddish brown layer of copper gets deposited on the zinc metal.

Chemical equation:
$\mathrm{Zn}\left(s\right)+{\mathrm{CuSO}}_4\left(\mathrm{aq}\right)\to {\mathrm{ZnSO}}_4\left(\mathrm{aq}\right)+\mathrm{Cu}\left(s\right)\left(\mathrm{Blue}\right)\left(\mathrm{Colourless}\right)$