Rates of reaction
You will be expected to remember the factors that affect the rate of reactions, and to plot or interpret graphs from rate experiments.
The rate of a reaction increases if:
The graph above summarises the differences in the rate of reaction at different temperatures, concentrations and size of pieces. The steeper the line, the greater the rate of reaction. Reactions are usually fastest at the beginning, when the concentration of reactants is greatest. When the line becomes horizontal, the reaction has stopped.
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