Year 11 - Science
Catalysts and rate
Rate of reaction
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This pupil-friendly study guide includes a unit summary, clear notes, common mistakes, and quick questions with answers.
Unit Summary
This unit explores factors influencing reaction rates, including temperature, concentration, surface area, and catalysts. It covers using models and theories to develop hypotheses, planning and conducting experiments safely, selecting appropriate techniques, and presenting and translating data.
Lesson Summary
You will learn to describe what a catalyst does and explain how it affects the rate of reaction in terms of activation energy, and justify its use for a reaction based on experimental results.
Key Notes
- A catalyst affects the reaction rate without being used up.
- A catalyst reduces the activation energy needed for a reaction.
- With a catalyst present, more collisions between reactants result in the formation of product(s).
- Enzymes are biological catalysts.
- Catalysts vary in efficiency; qualitative data helps evaluate effectiveness.
Vocabulary To Learn
- catalyst: A catalyst is a chemical that increases the rate of a reaction without itself being used up.
- activation energy: The minimum energy that the particles must have in order to react is known as the activation energy.
- reaction profiles: Reaction profiles are diagrams that show the energy of the reactants and products in a chemical reaction.
- qualitative data: Qualitative data is information that describes qualities or characteristics that cannot be measured with numbers.
Common Mistakes To Avoid
- Catalysts increase the amount of product formed.
3 Quick Questions (With Answers)
1. Explain the scientific idea in this lesson using two key points.
A catalyst affects the reaction rate without being used up. A catalyst reduces the activation energy needed for a reaction.
2. Define this scientific word and use it in context. 'catalyst'
A catalyst is a chemical that increases the rate of a reaction without itself being used up. Include the word in a full scientific explanation, not as a single label.
3. Correct this common scientific misunderstanding.
Mistake: Catalysts increase the amount of product formed. Correction: Catalysts do not affect the quantity of products formed. They increase the rate at which the products are formed.
More Lessons In This Unit
- Appropriate equipment for measuring the rate of a reaction Study Guide
- Collision theory Study Guide
- Concentration and rate: analysis Study Guide
- Concentration and rate: practical using end point method Study Guide
- Concentration and rate: practical using gas collection method Study Guide
- Evaluating methods for measuring the rate of reaction Study Guide
- Surface area and rate: analysis Study Guide
- Surface area and rate: practical Study Guide
- Temperature and rate: practical Study Guide
- The rate of a chemical reaction: including graphs Study Guide
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