Considering the influence of a catalyst on a chemical equilibrium, which one of the following is wrong? The catalyst:
Correct answer: D. Changes the equilibrium constant
- A. Increases the speed of both forward and reverse reactions to the same extent
- B. Does not change the relative amount of substances present at equilibrium
- C. Changes the time required for reaching the equilibrium
- D. Changes the equilibrium constant
Explanation
A catalyst does not change the equilibrium constant (K) or the position of equilibrium. It only increases the rate at which both the forward and reverse reactions occur, allowing the system to reach equilibrium faster.
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About Chemical Equilibrium
Reversible reactions reach dynamic equilibrium when forward and reverse rates become equal, and Le Chatelier's principle predicts the effect of changing concentration, pressure or temperature. The chapter also covers solubility product, the common ion effect, buffer action and the conditions used in Haber's process, with equilibrium shifts distinguished from changes in the equilibrium constant.
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