A few crystals of copper sulphate are heated in dry boiling tube.
i) What is the colour of the crystals before and after heating?
ii) What is the reason for the colour change?
iii) Can its original colour be restored? How?
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Answer:
(i)The colour of the crystals before heating is blue, while after heating it becomes white.
(ii)The reason is because the hydrated copper sulphate crystals lose its water of crystallization after heating, which forms anhydrous copper sulphate.
(iii)Its original colour can be easily restored by just adding water back to the anhydrous copper sulphate.
Answered by
1
Answer:
(i)The colour of the crystals before heating is blue, while after heating it becomes white.
(ii)The reason is because the hydrated copper sulphate crystals lose its water of crystallization after heating, which forms anhydrous copper sulphate.
(iii)Its original colour can be easily restored by just adding water back to the anhydrous copper sulphate.
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