Question

what shade of blue is copper sulphate?
Note: I know that copper sulphate is blue in colour, I just want to know what shade of blue is it.
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Answer 1

Answer:

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