the anhydrous salt which changes colour on reaction with water:
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the anhydrous salt which changes colour on reaction with water . answer is no
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When water is then added to the anhydrous compound, it turns back into the pentahydrate form, regaining its blue color, and is known as blue vitriol. Copper(II) sulfate pentahydrate can easily be produced by crystallization from solution as copper(II) sulfate, which is hygroscopic.
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