Question

State what happens when blue crystal of copper sulphate are heated

Answer 1

When copper sulphate (blue vitriol ,CuSO4.5H2O) is heated then its blue colour fades away and it turns from Blue to White and becomes anhydrous copper sulphate (CuSO4) this happens because copper sulphate loses its water of crystallization. In this way we can show that copper sulphate contains water of crystallization.

Answer 2

Answer:

The blue coloured copper sulphate crystals turns white due to the loss of water molecules. ... When copper sulphate is heated, it looses water molecules and hence it looses blue colour.