Crystals of copper sulphate are heated in a test tube for some time. What is the colour of copper sulphate crystals before and after heating? What is the source of liquid droplets present in the inner,upper side of test tube during the heating process?
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The colour of hydrated copper sulphate CuSO4.5H2O is blue that turns into white, when heated at high temperature in a test tube, due to the loss of water molecules from copper sulphate.
The liquid droplets appearing on the upper side of the test tube are the water molecules that evaporate on heating and condense on touching the cooler surface of the upper part of the test tube.
The liquid droplets appearing on the upper side of the test tube are the water molecules that evaporate on heating and condense on touching the cooler surface of the upper part of the test tube.
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Answer:
The colour of hydrated copper sulphate CuSO4.5H2O is blue that turns into white, when heated at high temperature in a test tube, due to the loss of water molecules from copper sulphate.
The liquid droplets appearing on the upper side of the test tube are the water molecules that evaporate on heating and condense on touching the cooler surface of the upper part of the test tube.
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