Cambridge AS & A Level Chemistry
26.1Simple rate equations, orders of reaction and rate constants
Simple rate equations, orders of reaction and rate constants in Cambridge AS & A Level Chemistry: what the syllabus expects you to know, the learning objectives and how to practise.
Subtopic46 practice questions2 lessons
Learning objectives
What the syllabus expects you to be able to do.
- 26.1.1Use rate equation, order, overall order, rate constant, half-life, rate-determining step and intermediate.
- 26.1.2Use rate equations with orders 0, 1 or 2; deduce orders from graphs, initial rates and half-lives; calculate initial rates; construct rate equations.
- 26.1.3Show that the half-life of a first-order reaction is independent of concentration and use it in calculations.
- 26.1.4Calculate rate constants from initial rates and from half-life (k = 0.693/t½).
- 26.1.5Relate multi-step mechanisms to rate equations: suggest mechanisms, predict orders, identify intermediates, catalysts and the rate-determining step.
- 26.1.6Describe qualitatively the effect of temperature on the rate constant and rate.
Lessons
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Rate equations, orders and half-life
55 min
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Reaction mechanisms and the rate-determining step
45 min
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Sample question
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