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What happens if the copper sulphate crys...

What happens if the copper sulphate crystals taken into dry test tube are heated ?

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1) When copper sulphate crystals are heated, water present in crystals is evaporated.
2) Evaporated water appears as droplets on the walls of the test tube.
3) Blue coloured copper sulphate `(CuSO_4.5H_2O)` is turned into white colour because `5H_2O` molecules (water of crystallisation) are evaporated from each crystal.
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