Equilibrium Question 636

Question: A 1 M solution of glucose reaches dissociation equilibrium according to equation given below $ 6HCHO $ ⇌ $ C_6H_{12}O_6 $ . What is the concentration of HCHO at equilibrium if equilibrium constant is $ 6\times 10^{22} $ [MP PMT 2000]

Options:

A) $ 1.6\times {10^{-8}}M $

B) $ 3.2\times {10^{-6}}M $

C) $ 3.2\times {10^{-4}}M $

D) $ 1.6\times {10^{-4}}M $

Show Answer

Answer:

Correct Answer: D

Solution:

$ 6HCHO $ $ \overset{K_1}{\leftrightharpoons} $ $ C_6H_{12}O_6 $ forward reaction

$ C_6H_{12}O_6 $ $ \overset{K_1}{\leftrightharpoons} $ $ 6HCHO $ backward reaction

$ K_2={{[ \frac{1}{K_1} ]}^{{1}/{6};}} $ ; $ K_2={{[ \frac{1}{6\times 10^{22}} ]}^{{1}/{6};}} $

$ K_2=1.6\times {10^{-4}} $ M



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