GCSE Chemistry Rates of Reaction Revision Notes
Master GCSE Chemistry Rates of Reaction using simple revision notes, key facts and practice questions — all generated by AI for your exam.
Rates of reaction refer to how quickly a chemical reaction occurs. They can be affected by various factors such as temperature, concentration, surface area, and the presence of a catalyst.
Key Concepts
- 1Temperature increases reaction rate
- 2Higher concentration speeds up reactions
- 3Larger surface area enhances reaction rate
- 4Catalysts lower activation energy
- 5Reaction rates can be measured by changes in mass or volume
Simple Explanation
The rate of a reaction tells us how fast the reactants turn into products. If we heat a reaction, it usually goes faster because the particles move more quickly. Similarly, if we use more of a reactant or break it into smaller pieces, the reaction can happen quicker. Using a catalyst can also help speed things up without being used up in the process.
Memory Trick
“Remember the acronym 'TCSCC' for 'Temperature, Concentration, Surface Area, Catalyst, Collision' to recall the factors affecting reaction rates.”
Flashcards
What factors affect the rate of reaction?
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Exam Questions
Describe and explain how temperature affects the rate of reaction. [6 marks]
6 marksView mark scheme hint▾
Discuss particle movement, collision frequency, and energy; include examples.
Explain how increasing concentration affects reaction rates. [4 marks]
4 marksView mark scheme hint▾
Mention particle collisions and the number of reactant molecules.
What is meant by the term 'catalyst'? [2 marks]
2 marksView mark scheme hint▾
Define catalyst and explain its role in reactions.
Practice Quiz
What happens to the rate of reaction when temperature increases?
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