Practice question
Question
In 2A(g) + B(g) <=> 2C(g) , if Kc = 4 and the equilibrium mixture contains 0.2 mol A , 0.1 mol B , and 0.4 mol C in a 1 L vessel, what happens if 0.1 mol A is added?
Explanation
Initial equilibrium: [A] = 0.2 M , [B] = 0.1 M , [C] = 0.4 M , Kc = ((0.4)²/(0.2)²(0.1)) = 4 . After adding 0.1 mol A , [A] = 0.3 M , reaction shifts right to restore equilibrium.
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