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What is blue vitriol? How it is prepared...

What is blue vitriol? How it is prepared?

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Cupric sulphate `(CuSO_4cdot5H_2O)` is blue vitriol.
Preparation: It is prepared by dissolving cupric oxide in dilute sulphuric acid. The solution is concentrated by evaporation. Then blue crystals of copper sulphate pentahydrate separate out on cooling.
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