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Sodium Thiosulphate and Hydrochloric Acid Reaction Investigation Aim: To find out if and how temperature affects the rate of reaction of Sodium Thiosulphate and Hydrochloric Acid. Background Knowledge: Reaction rates are important. They need to be controlled so that it is the right rate. If a reaction runs too slowly, the process will be slow and inefficient. If it runs too fast, there may be an explosion if it runs out of control. The temperature has an effect on the speed of reaction. Most reactions double for every 10oC rise in temperature. To know how reactions occur, we have to look at particle level. In a reaction the particles of the reactants have to collide to mix. They need to collide with enough energy to break the bonds that already exist. The minimum collision energy required for a reaction is called 'activation energy'. When the reactants have maximum energy, the reaction is the fastest because the particles...

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