blue crystals of copper sulphate becomes colorless on heating.give reason why?
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Copper sulphate contains 5 water of crystallisation, so it is blue in colour. Its formular is CuSO4.5H2O. So, when heated, water evaporates and it becomes only CuSO4. The blue colour was due to the presence of water. So, the absence of water makes it colourless.
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Answer:
Explanation:
On heating the blue salt of copper sulphate it is seen that it becomes colourless. This is so because the salt strongly looses all the water of crystallization, which leads to the formation of anhydrous copper sulphate which is white in colour. The salt containing water crystallization is called hydrated salts.
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