Question

When blue vitriol is heated upto 230 degree centigrade then what happens

Answer 1

Answer:

Blue vitriol looses its colour. Blue vitriol is nothing but CuSO4 · 5H2O.

Thus, when we heat it, it looses its water of crystallization and blue colour. It becomes colourless. It becomes anhydrous CuSO4.

More: It can be hydrated if we provide water to it again.

Answer 2

Answer: At 230∘C, it loses the fifth molecule of water and becomes anhydrous copper sulfate. This anhydrous copper sulfate is amorphous in nature; it again becomes blue in presence of water.

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