Question

The solubility of silver chloride ___________ in the presence of sodium chloride because of __________.

• A. increases; common ion effect
• B. increases; aldol condensation
• C. decreases; common ion effect
• D. decreases; aldol condensation

Answer 1

The correct option is C decreases; common ion effect

The solubility of silver chloride decreases in the presence of sodium chloride because of common ion effect.

$AgCl\rightleftharpoons A{g}^{+}+C{l}^{-}$

$NaCl\to N{a}^{+}+C{l}^{-}$

Sodium chloride is a strong electrolyte and completely dissociates to provide chloride ions that are common ions. The chloride ions shift the equilibrium for dissociation of $AgCl$ towards left.