Question

· How will you obtain pure crystals of copper sulphate?​

Answer 1

Answer:

Pure copper sulphate can be obtained from an impure sample by re-crystallization. The impure sample is dissolved in water, heated and then cooled which then later forms crystals. These copper sulphate crystals are then separated by filtration and drying.

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Answer 2

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.