Question

a nail of iron is added to a solvent of iron(II) sulphate and copper metal are formed

Answer 1

Hey.

Here is the answer.

When iron nails are kept dipped in copper sulphate solution for about 30 minutes, the blue colour of the aqueous copper sulphate would slowly fade to become green and a brown deposition would be seen on the iron nails.

Iron displaces copper to form ferrous sulphate’s aqueous solution(green) and copper(brown flakes) precipitates out.

The chemical reaction is

CuSO4(blue)(aq) + Fe(gray)(s) → FeSO4(green)(aq) + Cu(brown)(s)

Thanks.