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Chemistry · Paper 2 · Foundation + Higher

Read reaction-rate graphs

Key ideas1 of 3

Read the axes first

For a gas-volume graph, time is on the horizontal axis. Volume is on the vertical axis. A steeper slope means a faster rate. The reaction slows as reactants are used up.

Gas-volume curves A and B both reach 60 cm³. A reaches its plateau at 40 s; B at 80 s.

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Practice, downloads and sources

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AQA Combined Science Trilogy 8464 · 5.6.1.1. Original teaching notes, questions and diagrams. Animations are simplified models; speeds and practical readings are illustrative.