Question

If an iron nail is immersed in the aqueous solution ofcopper sulphate,what are the changes

Answer 1

This happens when all the copper is displaced from the solution of copper sulphate. When Iron nail (Ferrum) is dipped in Copper sulphate (CuSO4) there takes reaction between them and coppersulphate change its color from blue to light green. This shows Iron is more reactive than Copper, it can replace Copper from CuSO4.

Answer 2

CuSO4 + Fe -----------------> FeSO4 + Cu

[blue]      [solid]                   [green]