Equilibrium Question 645

Question: The equilibrium constant (Kc) for the reaction $ HA+B $ ⇌ $ B{H^{+}}+{A^{-}} $ is 100. If the rate constant for the forward reaction is 105, then rate constant for the backward reaction is [CBSE PMT 2002]

Options:

A) $ 10^{7} $

B) $ 10^{3} $

C) $ {10^{-3}} $

D) $ {10^{-5}} $

Show Answer

Answer:

Correct Answer: B

Solution:

$ K_{c}=\frac{K_{f}}{K_{b}}\therefore ,K_{b}=\frac{K_{f}}{K_{c}}=\frac{10^{5}}{100}=10^{3} $



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