The rate expression for the reaction between P\text{P}P and Q\text{Q}Q is
rate=k[P][Q]2 \text{rate} = k [\text{P}] [\text{Q}]^2 rate=k[P][Q]2Which statement is correct?
The rate constant has units mol−1dm3s−1\text{mol}^{-1} \text{dm}^3 \text{s}^{-1}mol−1dm3s−1
The rate of the reaction is multiplied by 4 if the concentration of P\text{P}P is doubled and the concentration of Q\text{Q}Q is halved.
The rate of the reaction increases by a factor of 12 if the concentration of P\text{P}P is tripled and the concentration of Q\text{Q}Q is doubled.
The rate constant is independent of temperature.
32 exam-style questions on AQA A Level Chemistry Rate equations (A-level only), covering Rate equations (A-level only) and Determination of rate equation (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.