Notes
(Edexcel / AQA / OCR – Pure Chemistry)
1. What is Kinetics?
● Kinetics studies the rate of chemical reactions — how fast reactants turn into
products.
● Reaction rate depends on collision frequency and energy of collisions between
particles.
2. Factors Affecting Reaction Rate
Factor Effect on Rate Explanation
Concentration Higher conc. → faster rate More particles in same volume → more
collisions
Pressure Higher pressure → faster More gas particles in volume → more
(gases) rate collisions
Surface Area More surface area → faster More area for particles to collide
rate
Temperature Higher temp → faster rate Particles move faster and have more energy
Catalyst Increases rate without Lowers activation energy → more successful
being used collisions
3. Collision Theory