Why is dilute sulphuric acid added during crystallization of copper sulphate?

Prevent hydrolysis of copper sulphate

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Prevent crystallization of copper sulphate

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Enhance formation of large crystals

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All of the above

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Solution

The correct option is A Prevent hydrolysis of copper sulphate
To crystallise copper sulphate, it is dissolved in water and a small quantity of dilute sulphuric acid is added to prevent the hydrolysis of copper sulphte. The impurities left behind in the solution are removed by filtration.

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Why is dilute sulphuric acid used in place of concentrated sulphuric acid to prepare copper sulphate?

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