Year 11 - Science
Temperature 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 explain, using the collision theory, how warming or cooling a reactant will affect the rate of a reaction.
Key Notes
- Increasing temperature generally increases rate by boosting the energy and frequency of collisions between particles.
- Cooling a reactant decreases its reaction rate by reducing collision energy and frequency.
Vocabulary To Learn
- collision theory: The collision theory is that particles must collide, and with sufficient energy, in order to react.
- activation energy: The minimum energy that the particles must have in order to react is known as the activation energy.
- rate of reaction: Rate of reaction is the speed with which a chemical reaction takes place.
- end-point method: An end-point method is used to measure the progress of a reaction until it has reached completion or a desirable point, e.g. a colour change.
Common Mistakes To Avoid
- Increasing the temperature increases the rate product is formed, and therefore think a faster reaction produces more product.
3 Quick Questions (With Answers)
1. Explain the scientific idea in this lesson using two key points.
Increasing temperature generally increases rate by boosting the energy and frequency of collisions between particles. Cooling a reactant decreases its reaction rate by reducing collision energy and frequency.
2. Define this scientific word and use it in context. 'collision theory'
The collision theory is that particles must collide, and with sufficient energy, in order to react. Include the word in a full scientific explanation, not as a single label.
3. Correct this common scientific misunderstanding.
Mistake: Increasing the temperature increases the rate product is formed, and therefore think a faster reaction produces more product. Correction: Increasing the temperature will make the reaction proceed faster but will not change the amount of product formed. The reactants are the limiting factor, not the temperature.
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
- Surface area and rate: practical Study Guide
- The rate of a chemical reaction: including graphs Study Guide
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