Question

a blue colour salt becomes white on heating. give the reason for the observation. what happens when we add water to the salt which is obtained after heating? also write its formula​

Answer 1

Answer:

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Answer 2

Answer:

this is because the water of crystallization present in the salt evaporates causing the change in colour. when we add water, the salt gets rehydrated and changes colour to blue.

the salt is blue vitriol (copper sulphate)

CuSO4.10H2O