Complete and balance the following reaction :

$\mathrm{Fe}+\mathrm{CuSO}4\to$

Iron is reacting with Copper sulphate to replace Sulphate ions and form Ferrous sulphate and Copper.

Hence, the complete balanced equation is-

$\underset{\mathrm{Iron}}{\mathrm{Fe}\left(\mathrm{s}\right)}+\underset{\mathrm{Copper}\mathrm{sulphate}}{{\mathrm{CuSO}}_4\left(\mathrm{aq}\right)}\to \underset{\mathrm{Ferrous}\mathrm{sulphate}}{{\mathrm{FeSO}}_4\left(\mathrm{aq}\right)}+\underset{\mathrm{Copper}}{\mathrm{Cu}\left(\mathrm{s}\right)}$