Which of the following statements best describes a chemical system that has reached…
CHEMISTRY · Single correct · A Level · Chemistry · Chemical equilibria (Le Chatelier’s principle and Kc) · Chemical equilibria (Le Chatelier’s principle and Kc)
Problem
Which of the following statements best describes a chemical system that has reached dynamic equilibrium?
(a) At equilibrium, the concentrations of reactants and products become equal, so no further change occurs.
(b) Dynamic equilibrium exists when the forward reaction rate drops to zero while the reverse reaction continues at the same rate, keeping concentrations constant.
(c) Dynamic equilibrium is reached when the forward and reverse reactions continue to occur at equal rates, so macroscopic properties remain constant.
(d) At equilibrium, both reactions proceed, but the forward reaction remains slightly faster because some reactant is still present.