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What is meant by water of Crystallisatio...

What is meant by water of Crystallisation ? How do you show that copper sulphate crystal contains water of crystallisation ?

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When we heat copper sulphate crystals the water is removed and the salt turn white. If you moisturize the crystals again with water you will find that the blue olour of crystals reappears.
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ZEN PUBLICATION-ACIDS, BASES, AND SALTS-ZEN ADDITOINAL QUESTIONS SECTIONS (Short Answer Type Questions - I)
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