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Experiment on rates of reaction. Rates Of Reaction: The time taken for a reaction to take place. The speed of the reaction has a big effect on the time, e.g. time taken for concrete to set may take hours, days or even weeks. Factors: Temperature: The temperatures during the rates of reactions are important because they can change how quick the reaction takes place. * Increasing the temperature will cause the particles to move faster, with more energy. * They will therefore collide more often and with greater concentration. * These two things mean there are successful collisions per second and therefore a moderate rate of reaction. Concentration: The concentration is an important factor in this test. It can change how quick the reaction takes place. * Increasing the concentration or a reactant simply means there are more particles which may collide and so react. * More collisions means a faster reaction. Particle Size: If...

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