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Lessons for this topic haven’t been written yet. The objectives below show exactly what the syllabus expects, so you can plan with them in the meantime.
What Cambridge says you should be able to do, in our words. Codes are the topic number plus the objective’s position.
Explain and use the terms rate equation, order of reaction, overall order of reaction, rate constant, half-life, rate-determining step and intermediate.
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(a) Understand and use rate equations of the form rate = k[A]ᵐ[B]ⁿ (for which m and n are 0, 1 or 2); (b) deduce the order of a reaction from concentration–time graphs or from experimental data relating to the initial rates method and the half-life method; (c) interpret experimental data in graphical form, including concentration–time and rate–concentration graphs; (d) calculate an initial rate using concentration data; (e) construct a rate equation.
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(a) Show understanding that the half-life of a first-order reaction is independent of concentration; (b) use the half-life of a first-order reaction in calculations.
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Calculate the numerical value of a rate constant, for example by: (a) using the initial rates and the rate equation; (b) using the half-life, t½, and the equation k = 0.693/t½.
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For a multi-step reaction: (a) suggest a reaction mechanism that is consistent with the rate equation and the equation for the overall reaction; (b) predict the order that would result from a given reaction mechanism and rate-determining step; (c) deduce a rate equation using a given reaction mechanism and rate-determining step for a given reaction; (d) identify an intermediate or catalyst from a given reaction mechanism; (e) identify the rate-determining step from a rate equation and a given reaction mechanism.
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Describe qualitatively the effect of temperature change on the rate constant and hence on the rate of a reaction.
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