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ZIMSEC A-Level Chemistry

6.1.8.3Mechanism of reactions

Mechanism of reactions in ZIMSEC A-Level Chemistry: what the syllabus expects you to know, the learning objectives and how to practise.
Subtopic22 practice questions1 lesson

Learning objectives

What the syllabus expects you to be able to do.

  1. 6.1.8.3.1Explain the rate-determining step.
  2. 6.1.8.3.2Deduce a mechanism from the order of reaction and vice versa.

Lessons

  • Reaction mechanisms and the rate-determining step

    45 min

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Sample question

A sample question on this topic. Answer it, check it, then read the worked answer.

Mechanism of reactions: sample question

1 mark

A reaction occurs in two steps: step 1 (slow) A+B→C+D\ce{A + B -> C + D}; step 2 (fast) A+C→E\ce{A + C -> E}. What is the rate equation?

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