In which of the following cases the reaction is farthest from completion?
Correct answer: B. K=10-2
- A. K=1
- B. K=10-2
- C. K=10
- D. K=102
Explanation
The value of the equilibrium constant (K) does not determine how far a reaction is from completion. The equilibrium constant represents the ratio of product concentrations to reactant concentrations at equilibrium for a given reaction. It indicates the extent to which a reaction reaches equilibrium, but it does not directly indicate how far the reaction is from completion. The position of equilibrium, which determines the extent of completion, is influenced by factors such as the relative concentrations of reactants and products, temperature, and pressure (for gaseous reactions). The lower the Kc value, the farthest will be the reaction from completion. In this case, the reaction will not go to completion.
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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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