Reversibility and dynamic equilibria
1 mark · NormalWhich statement correctly describes the characteristics of a reaction at dynamic equilibrium in a sealed container?
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Correct option: The forward and reverse reactions continue at the same rate, and concentrations of all substances stay constant.
Common mistakes: Choosing options that describe equilibrium as reactions stopping; Saying only one direction continues at equilibrium
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Marking points
A1 · 1 mark · Selects the correct statement describing both equal rates and constant concentrations at dynamic equilibrium.
Worked solution
At dynamic equilibrium in a sealed container, the forward and reverse reactions occur at the same rate, so the concentrations of all reactants and products remain constant. This is described in option 3.