Question

Blue crystal of copper sulphate on heating in a dry test tube become colourless. Give reasons

Answer 1

Explanation: Blue Crystals of Copper Sulphate contain 5-water of crystallisation and that's why it's formula is : CuSO4.5H20

And that's why when it is heated the water of crystallisation evaporates and thus the compound retains becomes colourless or white powder.

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