Question

What happens if copper sulphate powder is heated

Answer 1

it loses two water molecules at ~63°C followed by two more at ~109°C and the final water molecule at ~200°C and turns to white coloured anhydrous copper sulphate.

Answer 2

Copper sulphate crystals turns white due to the loss of water molecules. The formula of copper sulphate is CuSO4.5H2O.

When copper sulphate is heated, it looses water molecules and hence it looses blue colour.

Hope this helps...