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Preparation from Magnesium

A saturated s...

Question

A saturated solution of copper sulphate was prepared at $60 ° C$ and put in three tubes X, Y and Z.
(i) Tube X is heated to $95 ° C$ .
(ii) Tube Y is cooled to $25 ° C$ .
(iii) 10 ml. of water is added to tube Z.

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Solution

(a) A saturated solution of copper sulphate was prepared at $60 ° C$ and when tube X is heated to $95 ° C$ . the colour of crystals before heating was blue, which changes the colour of crystals after heating to white.
${CuSO}_{4} . 5 H_{2} O \overset{∆}{\to} {CuSO}_{4} + 5 H_{2} O copper sulphate crystal$
(b) When tube Y is cooled at $25 ° C$ , water will evaporate slowly and crystals of copper sulphate will be formed.
(c) When 10 ml. of water is added to tube Z. the disappeared blue colour of copper sulphate solution will appear again.

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