Chemical Reactions 0.0 / 5 ? ScienceChemical reactionsGCSEAQA Created by: JackWillcocksCreated on: 13-09-17 13:25 What is a catalyst? a substance that increases the speed of a reaction 1 of 5 How do reactions start? The particles collide 2 of 5 What is the speed of reaction? There is no set speed, they all react at different speeds 3 of 5 How do you measure the rate of a reaction? You measure it from the amount of product made in a certain amount of time 4 of 5 ggg gggg 5 of 5
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