Experiments to measure the rate of reaction
2 marks · EasyExplain how increasing the temperature affects the rate of a reaction between a solid and a solution. Give two reasons for your answer.
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Must show: increases rate, particles move faster, more frequent collisions, more energetic collisions
Also accept: more particles have enough energy to react; more collisions with energy above activation energy
Common mistakes: Only repeated 'it makes it faster' with no reason
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Marking points
B1 · 1 mark · States rate increases when temperature increases.
B1 · 1 mark · Explains (any valid reason): particles have more energy, more frequent collisions, higher energy collisions, more collisions above activation energy.
Worked solution
Increasing the temperature increases the rate of reaction. This is because the particles move faster, so they collide more often and with more energy, making successful collisions more likely.