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Common Ion Effect

When does a p...

Question

When does a precipitate form?

A

When something is insoluble in solution.

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B

When something is soluble in solution.

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C

When too much of a substance is added to solution.

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D

Whenever a solid is added to solution.

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E

Whenever liquid is added to a solution.

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Solution

The correct option is C When too much of a substance is added to solution.
When too much of a substance is added to solution, a precipitate forms.
Also, when ionic product exceeds solubility product, the precipitation occurs.
In a supersaturated solution, the excess ions recombine to form solid which results in precipitation.

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