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| 1. |
A blue - coloured salt becomes white on heating. Give reason for the above observation. What happens when we add water to the salt obtained after heating ? Also write its formula. |
| Answer» Solution :The blue salt is hydrated copper sulphate `(CuSO_(4).5H_(2)O)`, which LOSES its water of crystallization and becomes WHITE anhydrous copper sulphate `(CuSO_(4))` UPON heating it. On adding water, the anhydrous form again becomes hydrated and the blue colour is REGAINED. | |