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CBSE Class 9 Answered

What is meant by crystallisation? How is impure copper sulphate purified by the process?
Asked by Topperlearning User | 08 May, 2014, 09:00: AM
answered-by-expert Expert Answer

Crystallization is a process that separates a pure solid in the form of its crystals from a solution.

The various steps of purification used for impure copper sulphate are:

1.Take some (approximately 5 g) impure sample of copper sulphate in a china dish.

2.Dissolve it in minimum amount of water and filter out the impurities.

3.Evaporate water from the copper sulphate solution so as to get a saturated solution.

4.Cover the solution with a filter paper and leave it undisturbed at room temperature to cool slowly for a day.

5.Then crystals of copper sulphate in the china dish are obtained.

Answered by | 08 May, 2014, 11:00: AM

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