Reaction kinetics topic check
Test H1 Chemistry rate equations, reaction orders, half-life and collision theory, then practise explaining temperature and catalyst effects.
Learning goals
- Explain and use rate of reaction, rate equation, order of reaction, rate constant, half-life, activation energy and catalysis
- Deduce the orders in a rate equation by the initial rates method
- Justify whether a reaction is zero or first order from a concentration–time graph
- Calculate an initial rate from concentration data using a rate equation
- Explain why the half-life of a first-order reaction does not depend on concentration
- Explain how changing concentration affects reaction rate using collision frequency
- Explain activation energy using the Boltzmann distribution
- Explain how temperature affects the rate constant, and so the rate, using the Boltzmann distribution and collision frequency
- Explain that a catalyst gives a reaction a pathway of lower activation energy and so a larger rate constant
- Interpret a catalyst's effect using the Boltzmann distribution
- Outline how heterogeneous catalysis works, using the removal of nitrogen oxides from car exhaust gases
- Describe enzymes as protein catalysts with high specificity, explained by the lock-and-key model, and sensitivity to temperature and pH
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- Question count is checked before you start.
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Your work
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About 10 minutes
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Paper instructions
This is for practice only and doesn’t count towards your course progress.
- Question count is checked before you start.
- Feedback appears after you check each answer.
Your work
Without an account, unfinished answers stay in this tab. Signed in, they are saved on this device until the deadline shown when you start.
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Recent attempts
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Beyond the syllabus: optional enrichment that does not count towards your progress.
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About 10 minutes
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About 10 minutes
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Paper instructions
Your result can count towards your course progress.
- Question count is checked before you start.
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Your work
Without an account, unfinished answers stay in this tab. Signed in, they are saved on this device until the deadline shown when you start.
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Recent attempts
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Beyond the syllabus: optional enrichment that does not count towards your progress.
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About 10 minutes
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Practise: multiple-choice
Practise questions on the skills you are learning.
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- Question count is checked before you start.
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Your work
Without an account, unfinished answers stay in this tab. Signed in, they are saved on this device until the deadline shown when you start.
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Getting your questions…
Recent attempts
History is stored only in this browser.
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Beyond the syllabus: optional enrichment that does not count towards your progress.
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Practise questions on the skills you are learning.
About 10 minutes
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Time is up and your answers could not be submitted; check your connection and try again.
Paper instructions
This is for practice only and doesn’t count towards your course progress.
- Question count is checked before you start.
- Feedback appears after you check each answer.
Your work
Without an account, unfinished answers stay in this tab. Signed in, they are saved on this device until the deadline shown when you start.
Practice settings
Getting your questions…
Recent attempts
History is stored only in this browser.
No completed attempts are saved yet.
Beyond the syllabus: optional enrichment that does not count towards your progress.
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