Question

what do you observe when copper sulphate is heated

Answer 1

it turns white from blue as it loses its water of crystallisation

Answer 2

A reversible reaction of hydrated copper(II) sulfate. Students remove the water of crystallisation from hydrated copper(II) sulfateby heating. Condensing the vapour produced in a second test-tube collects the water. The white anhydrous copper(II) sulfate is then rehydrated and the blue colour returns