Which of the following statements describes a reversible reaction at equilibrium?
Correct answer: C. Both forward and reverse reactions occur simultaneously under the same conditions
- A. Both forward and reverse reactions do not occur simultaneously
- B. Both forward and reverse reactions occur simultaneously but under different conditions
- C. Both forward and reverse reactions occur simultaneously under the same conditions
- D. Forward and reverse reactions take place at different times and different conditions
Explanation
A key feature of dynamic equilibrium is that the forward and reverse reactions are occurring continuously and simultaneously at the same rate. This happens under a specific, constant set of conditions (temperature, pressure, etc.).
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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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