Reversibility and dynamic equilibria

2 marks · Easy

At dynamic equilibrium in a sealed container, the rate of the forward reaction is 0.12 mol/min. Calculate the rate of the backward reaction. State your answer and give a reason.

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0.12 mol/min; because the rates of forward and backward reactions are equal at dynamic equilibrium. mol/min (±0.01)

Also accept: The rate of backward reaction is 0.12 mol/min as at equilibrium both rates are equal.

Common mistakes: Forgetting to state the rate.; Not giving a reason.

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Marking points

M1 · 1 mark · States that at dynamic equilibrium, rates of forward and backward reactions are equal (reason).

A1 · 1 mark · Correctly states the backward rate is 0.12 mol/min.

Worked solution

At dynamic equilibrium, rates of forward and backward reactions are equal.

So, rate of backward reaction = 0.12 mol/min.