Learning objective
Write rate equations using experimentally determined orders.
Read the explanation, check the common trap, then practise with flashcards and questions.
At a glance
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Flashcards
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Questions
Topic
Rate equations (A-level only)
Subtopic
Rate equations and orders (A-level only)
Study support
Understand this objective
Quick explanation
Write rate equations using experimentally determined orders
- This point belongs to Rate equations (A-level only), especially Rate equations and orders (A-level only).
- You need to be able to write rate equations using experimentally determined orders.
- The key ideas to know are rate equation and order.
- 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 Rate equations and orders (A-level only) to exam-style questions, flashcards, and revision notes for Rate equations (A-level only).
Quick student answer
Which of the following rate equations correctly represents a second-order reaction with respect to reactant A?
Direct answer
Rate = k[A]^2
Key terms
- Rate constant (k): A proportionality constant in the rate equation that is specific to a particular reaction at a given temperature.
- Order of reaction: The sum of the powers of the concentration terms in the rate equation, indicating the relationship between concentration and rate.
Common trap
Incorrectly identifying the order of a reaction: Remember that the order must be determined experimentally and is not necessarily related to the stoichiometric coefficients.
Related questions
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Flashcard prompts
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Revision tools
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Revision notestopic notes
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Open revision notesRelated learning objectives
- Deduce orders of reaction from initial rate data.
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)
- Explain the rate-determining step in a mechanism.
Mechanisms and rate-determining steps (A-level only)