question_answer

Crystals of copper sulphate are heated in a test tube for sometime. (a) What is the colour of copper sulphate crystals (i) before heating and (ii) after heating? (b) What is the source of liquid droplets seen on the inner upperside of the test tube during the heating process?  

Answer:

(a) (i) The colour before heating is blue. (ii) The colour after heating is white.                                        (1 x 2) (b) During the heating process the liquid droplets are the water of crystallisation present in the compound.                                                                                 (1)