blue crystal of copper sulphate on heating in a dry testube become colour less why.?
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Because they lose the water of crystallisation and hence become colour less on heating.
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Copper Sulphate crystals when heatedaround 200°C it loses it's water of crystallisation and forms white anhydrous copper Sulphate. ... Whenheated in a dry test tube, it will absorb water vapour from air and turn blueand form a liquid sloution with water.
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