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When A 2 and B 2 are allowed to react, the equilibrium constant of the reaction at 27 ° C is found ( K C = 4 ) . A 2 ( g ) + B 2 ( g ) ⇌ 2 A B ( g ) What will be the equilibrium concentration of AB?

Options

  1. A1.33M
  2. B2.66 M
  3. C0.66 M
  4. D0.33 M

Correct answer

C. 0.66 M

Step-by-step solution

K C = [ A B ] 2 [ A 2 ] [ B 2 ] 4 = [ 2 x / 4 ] 2 2 - x 4 4 - x 4 4 = 4 x 2 x 2 - 6 x + 8 x 2 - 6 x + 8 = x 2 x = 8 6 = 4 3 A B = 2 x 4 = 2 4 × 4 3 = 0.66 .

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