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Investigation to find out how particle size affects the reaction rate Aim: To find out whether particle size affects the rate of a reaction. The rate of reaction is the speed of the reaction. There are two ways in which the rate of reaction can be measured: o Measure how quickly one of the products in the reaction is made o Measure how quickly one of the products in the reaction disappears Collision theory: The theory that we use to explain how different variables change the rate of reaction is called the collision theory. For a reaction to take place, the particles of the substance that are reacting have to collide. If they collide with enough energy then they react. The minimum amount of kinetic energy that two particles need if they are going to react is called the activation energy. There are therefore two main ways of increasing the rate of reaction: o Increase the...

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