This key facts covers Key Facts: Factors Affecting Rate within Factors Affecting Rate for GCSE Chemistry. Revise Factors Affecting Rate in Rates of Reaction for GCSE Chemistry with 24 exam-style questions and 18 flashcards. This topic shows up very often in GCSE exams, so students should be able to explain it clearly, not just recognise the term. It is section 8 of 13 in this topic. Use this key facts to connect the idea to the wider topic before moving on to questions and flashcards.
📌 Key Facts: Factors Affecting Rate
- Temperature ↑ → particles faster + more have Ea → more successful collisions
- Concentration ↑ → more particles per volume → more frequent collisions
- Surface area ↑ → more exposed particles → more collisions at once
- Catalyst → lowers Ea → more particles can react
- Pressure ↑ (for gases) → same effect as concentration
- Catalysts are specific — each catalyst only works for certain reactions
- Enzymes are biological catalysts
Practice questions for Factors Affecting Rate
Which of the following factors does NOT affect the rate of a chemical reaction?
Explain, in terms of particles, why increasing temperature increases the rate of reaction.
Quick recall flashcards
What are enzymes?
Biological catalysts - specific and work at certain temperatures
What are the four factors that affect rate of reaction?
Temperature, Concentration, Surface area, Catalyst