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I am going to investigate how the concentration of sodium thiosulphate, affects the rate of reaction of sodium thiosulphate and hydrochloric acid. The rate of a chemical reaction is a measure of how fats the reaction takes place. For the reaction to take place the Sodium Thiosulphate molecules must collide with the hydrochloric molecules. A fixed amount of energy called the activation energy must be reached if the reaction is to take place. If the collision of the molecules can produce enough energy then the reaction will take place. When sodium thiosulphate reacts with hydrochloric acid Factors which affect the rate of reaction 1. The effect of concentration on the rate of reaction. The more concentrated the reactants, the greater will be the rate of reaction. This is because increasing the concentration, increases the number of collisions between molecules and so increases the rate of reaction. The reaction is fastest when the reactants...

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