Chapter summary
Rate of Reactions, at a glance
Explain why reactions speed up, and read what a progress graph actually proves.
O-Level 6092 (2026) / SEC G3 K324 (2027)
Quick revision
Revisit the essentials, then return to an explanation when you need it.
Rate describes change per unit time. Concentration, pressure, temperature and exposed surface area affect successful collisions. On a progress graph, slope indicates rate and the final level indicates measured amount.
Pure only
Pure: a catalyst lowers the activation barrier and is regenerated. A fair investigation changes one variable, controls alternatives and states how data will be analysed.