Year 11 - Science
Concentration and rate: practical using gas collection method
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 concentration of a reacting solution.
Key Notes
- The changing rate of a reaction can be found by measuring the amount of gas produced as the reaction progresses.
- Increasing concentration of a reacting solution introduces more reactant particles, so they collide more frequently.
- When reacting excess acid with equal amounts of magnesium, the same volume is produced for all concentrations of acid.
Vocabulary To Learn
- rate of reaction: Rate of reaction is the speed with which a chemical reaction takes place.
- 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
- Thinking that as the concentration of a solution in excess changes, so does the volume of gas produced.
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 amount of gas produced as the reaction progresses. Increasing concentration of a reacting solution introduces more reactant particles, so they collide more frequently.
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: Thinking that as the concentration of a solution in excess changes, so does the volume of gas produced. Correction: The slide deck uses graphical data to show that the same volume of gas is produced when different concentrations are used, so long as the reacting solution is in excess.
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
- 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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