If the concentration of $\mathrm{OH}^{-}$ions in the reaction $\mathrm{Fe}(\mathrm{OH})_3(\mathrm{~s})…

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
  1. 4 times
  2. 8 times
  3. 16 times
  4. 64 times

Solution

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

Asked in: NEET 2008 (Mains)

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