Question

When we put CuSO4 in water after sometime we find the solution turns blue. Why? Also on heating it what change will occur?

Answer 1

Anhydrous CuSO4 is white in color due to absence of water molecules.

When we make the solution of CuSO4 , water molecules will attach to CuSO4 molecule making CuSO4 . 5H2O.

This is blue in color.