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H2 is added to H2 + I2 ⇌ 2HI at equilibrium. Qc becomes less than Kc, so the reaction moves:
Abackward to reactants
Bto a new Kc value
Cwith no net change
Dforward to give HI
Answer & Solution
Correct answer: D. forward to give HI
With Qc below Kc, net reaction goes toward products until Qc rises back to Kc.
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