Year 11 - Science
Surface area and rate: practical
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 carry out a fair test to investigate how the rate of reaction depends on the surface area of a solid reactant.
Key Notes
- The changing rate of a reaction can be found by measuring the mass of gas produced as the reaction progresses.
- Smaller marble chips have a larger surface area than larger chips of the same mass.
- The larger the surface area, the faster the rate of reaction.
Vocabulary To Learn
- rate of reaction: Rate of reaction is the speed with which a chemical reaction takes place.
- surface area to volume ratio: The surface area to volume ratio is the surface area of a solid relative to its volume.
- independent variable: The independent variable is the single variable that is changed in an investigation.
- dependent variable: The dependent variable is the single variable that is measured or observed in an investigation.
- control variables: The control variables are variables that are kept constant in an investigation.
Common Mistakes To Avoid
- That a larger surface area produces a larger volume/mass of product.
3 Quick Questions (With Answers)
1. Explain the scientific idea in this lesson using two key points.
The changing rate of a reaction can be found by measuring the mass of gas produced as the reaction progresses. Smaller marble chips have a larger surface area than larger chips of the same mass.
2. Define this scientific word and use it in context. 'rate of reaction'
Rate of reaction is the speed with which a chemical reaction takes place. Include the word in a full scientific explanation, not as a single label.
3. Correct this common scientific misunderstanding.
Mistake: That a larger surface area produces a larger volume/mass of product. Correction: The experiment should help pupils realise they produce the same mass of carbon dioxide when using the same mass of calcium carbonate chips and powder.
More Lessons In This Unit
- Appropriate equipment for measuring the rate of a reaction Study Guide
- Catalysts and rate 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
- Temperature and rate: practical Study Guide
- The rate of a chemical reaction: including graphs Study Guide
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