Question

why do colour & solution of copper sulphate change when we take a solution of copper sulphate in a beaker and put an iron nail in it?

Answer 1

Answer:

This is an example of displacement reaction. Iron is more reactive than copper and replaces the copper in the copper sulphate solution. The blue colour changes to green colour due to the formation of iron sulphate solution.

CuSO4 + Fe --> FeSO4 + Cu

blue. green

hope it helps....

Answer 2

Answer:

because iron is more reactive than copper so it displace copper from copper sulphate and forms iron sulphate

The chemical equation can be written as: Fe+CuSO4→Cu+FeSO4.

Explanation:

When an iron nail is dipped in copper sulphate solution, a brown coating of copper is formed on the surface of iron and the colour of copper sulphate solution changes from blue to light green.