Question

Why addition of a inert salt to a sparingly soluble salt increases its solubility?

Answer 1

Adding a common cation or common anion to a solution of a sparingly soluble salt shifts the solubility equilibrium in the direction predicted by Le Châtelier's principle. The solubility of the salt is almost always decreased by the presence of a common ion.

Answer 2

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ADDING A COMMON ION SIMPLY ANION OR CATION WILL SHIFT THE SOLUBILITY EQUILLIBRIUM IN FORWARD DIRECTION . SO ACCORDING TO LE CHAT LIER PRINCIPAL THE SOLUBILITY INCRESES.

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