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
