For the reaction A + B ⇌ C, K = 4.0. If at some point the reaction quotient Q = 2, then:
Correct answer: C. More reactants should react
- A. More products should react
- B. More reactants should form
- C. More reactants should react
- D. The reaction is at equilibrium
Explanation
Since the reaction quotient (Qc = 2) is less than the equilibrium constant (Kc = 4), the ratio of products to reactants is too small. To reach equilibrium, the reaction must proceed in the forward direction, meaning more reactants must react to form more products.
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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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