What you'll learn
What controls reaction speed.
Key ideas
- Factors: temperature, concentration, surface area, catalysts (collision theory).
- Catalysts lower activation energy and aren't used up.
Exam tips
- Explain rate using collision frequency and energy.
- Measure rate by gas volume over time.
Common mistakes
- Saying a catalyst is used up.
- Vague 'more collisions' with no reason.