For the reversible reaction A ⇌ B (g) in a closed container

CHEMISTRY · Subjective · A Level · Chemistry · Chemical equilibria (Le Chatelier’s principle and Kc) · Chemical equilibria (Le Chatelier’s principle and Kc)

Problem

For the reversible reaction A ⇌ B (g) in a closed container, the measured rate of the forward reaction is 0.12 mol·L⁻¹·min⁻¹, while the rate of the reverse reaction is 0.05 mol·L⁻¹·min⁻¹. The concentrations of A and B are still changing. Explain why the mixture is or is not at equilibrium.

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