What do you see when penta hydrated copper - sulphate crystals are heated? Give reaction too.

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Solution

Copper sulfate is normally found in the form of blue crystals, copper (II) sulfate pentahydrate and on heating copper sulfate pentahydrate turns white due to loss of water from blue copper sulfate.It has water of hydration which forms water vapour on heating, leaving white anhydrous copper sulphate.
$CuSO_{4}\cdot 5H_{2}O\overset{heat}{\rightarrow}CuSO_{4}+ 5H_{2}O$

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