Question

What would you observe when crystals of copper (II) sulphate are heated in a test-tube strongly?

Answer 1

Following observations are observed when crystals of CuSO4 are heated.

•The crystals are converted to a powdery substance.
•The crystals lose their blue colour on further heating.
•Steaming vapours are produced inside the tube which condenses near the mouth of the tube to form a colourless liquid.
•On further heating, steam escapes from the mouth of the tube and water get collected in a beaker placed under the mouth of the tube.
•On further heating, the residue changes to white powder and steam stops coming out.