Question

A student heated few crystals oh copper sulphate in a dry boiling tube

Answer 1

If few crystals of copper sulphate are boiled in a dry tube then, reaction. is:
CuSO4•5H2O(s) --heat---> CuSO4(s) + 5H2O(l)
Before heating it was blue but after, it turned colourless (white). This is because, CuSO4 crystals have water as part of their structure.

I hope this answer helped you.

Answer 2

Answer:

(a) White

(b) Yes

(c) Copper sulphate crystals which seem to be dry contain water of

crystallization.

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