If the concentration of OH^- ions in the reaction Fe(OH)_3(~s) leftharpoons Fe^3+(aq)+3 OH^-(aq) is decreased by 1/4 times, then equilibrium concentration of Fe^3+ will increase by

Correct answer: (D) 64 times. To maintain the constant value of K_c , the concentration of Fe^3+ ion will increase by 64 times.

Q67 / 199 · NEET 2008 (Mains) · Chemistry

If the concentration of $\mathrm{OH}^{-}$ions in the reaction $\mathrm{Fe}(\mathrm{OH})_3(\mathrm{~s}) \rightleftharpoons \mathrm{Fe}^{3+}(\mathrm{aq})+3 \mathrm{OH}^{-}(\mathrm{aq})$ is decreased by $\frac{1}{4}$ times, then equilibrium concentration of $\mathrm{Fe}^{3+}$ will increase by

To maintain the constant value of $\mathrm{K}_c$, the concentration of $\mathrm{Fe}^{3+}$ ion will increase by 64 times.

Hence, the correct answer is option: 'D'.