Learning objective
Use a proposed mechanism to predict a rate equation.
Read the explanation, check the common trap, then practise with flashcards and questions.
At a glance
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Flashcards
0
Questions
Topic
Rate equations (A-level only)
Subtopic
Mechanisms and rate-determining steps (A-level only)
Study support
Understand this objective
Quick explanation
Use a proposed mechanism to predict a rate equation
- This point belongs to Rate equations (A-level only), especially Mechanisms and rate-determining steps (A-level only).
- You need to be able to use a proposed mechanism to predict a rate equation.
- The key ideas to know are rate equation and mechanism.
- Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.
Key concepts
Why it matters
This objective helps connect Mechanisms and rate-determining steps (A-level only) to exam-style questions, flashcards, and revision notes for Rate equations (A-level only).
Quick student answer
Which of the following statements about the rate equation is correct?
Direct answer
C) The rate equation can be derived from the proposed mechanism of the reaction.
Key terms
- Rate constant (k): A proportionality constant in the rate equation that is specific to a particular reaction at a given temperature.
- Mechanism: The step-by-step sequence of elementary reactions by which overall chemical change occurs.
Common trap
Confusing rate with rate constant: Remember that the rate is dependent on the concentrations of reactants, while the rate constant is a fixed value at a specific temperature.
Related questions
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Flashcard prompts
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Revision tools
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Flashcards0 linked cards
Practice Questions0 linked questions
Revision notestopic notes
Open the full topic revision notes when you are ready to review this objective in context.
Open revision notesRelated learning objectives
- Deduce orders of reaction from initial rate data.
Rate equations and orders (A-level only)
- Write rate equations using experimentally determined orders.
Rate equations and orders (A-level only)
- Calculate rate constants and their units.
Rate equations and orders (A-level only)
- Use half-life evidence for first-order reactions.
Rate equations and orders (A-level only)
- Interpret concentration-time graphs.
Rate equations and orders (A-level only)