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What happens to the value of the equilibrium constant (Kc) for a reaction if the...

Chemistry
JAMB 2023

What happens to the value of the equilibrium constant (Kc) for a reaction if the reaction is reversed?

  • A. It becomes zero
  • B. It becomes negative
  • C. It remains the same
  • D. It becomes the reciprocal of the original value
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Correct Answer: Option D
Explanation

If a reaction is reversed, the equilibrium constant (Kc) for the reversed reaction becomes the reciprocal of the original equilibrium constant. For a reaction:
A + B ⇌ C + D
The equilibrium constant Kc = [C][D]/[A][B]
For the reversed reaction:
C + D ⇌ A + B
The equilibrium constant Kc(reversed) = [A][B]/[C][D]
Thus, Kc(reversed) = 1/Kc.

There is an explanation video available below.


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Explanation Video

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