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Investigating How the Concentration of Sodium Thiosulphate Affects the Rate of Reaction, Between Sodium Thiosulphate and Hydrochloric Acid Background We had been experimenting with sodium thiosulphate and hydrochloric acid. We found that when we added hydrochloric acid to sodium thiosulphate it went cloudy, and eventually opaque. We decided to investigate how the concentration of the sodium thiosulphate would affect the rate of reaction. The experiment will be carried out as shown in 'fig 1', hydrochloric acid will be added to the sodium thiosulphate, and we will time how long it will take for the 'X' to be obscured. Fig 1 Planning Safety We must follow certain safety guidelines to avoid injury to ourselves or others; these safety measures are listed below: * Goggles must be worn, as hydrochloric acid is caustic and could cause damage to eyes. * Make sure all bags, stools etc are out of the way, so as not to be tripped over. * Remove blazer and...

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