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What is the effect of removing or adding a common ion? How could you do this?

What is the effect of removing or adding a common ion? How could you do this?

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Solution :

Addition of a common ion decreases the solubility of the solute. The addition of common ion shifted equilibrium towards reactant side hence causes a decrease in solubility.

Removal of a common ion tends to increase the solubility because equilibrium is shifted towards product side.

Addition of common ion is done by adding the salt containing common ion similar to the solute. The removal of common ion is done by precipitation of the solution containing common ion.

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