Question

Blue salt of copper sulphate heated colour less

Answer 1

actually blue salt of copper sulphate is chemically copper sulphate penta hydrate( CuSO4.5H2O ). blue coloure is due to thiese 5 moles of water . by heating this water evaporates and leaving CuSO4 which is colourless

Answer 2

Hey friend

Here is your answer

When blue salt of copper sulphate is heated it loses its water of crystallization to form anhydrous copper sulphate which is colourless.

CuSO4.5H2O=>CuSO4+5H2O

When water is added to the anhydrous copper sulphate it turns back to blue colour.

HOPE THIS HELPS YOU ☺