Question

In the presence of a common ion (incapable of forming complex ion), the solubility of salt _______ in solution.

• A. increases
• B. decreases
• C. remains the same
• D. cannot predict

Answer 1

The correct option is B decreases

$AB\to A^{+}+B^{-}$
$BC\to B^{+}+C^{-}$
Since $B^{+}$ is incapable of forming a complex salt it tends to decrease the solubility by Le-Chatelier's principle.