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Aim: -To see the effects of a change in temperature and concentration on the rate of a reaction. The reaction that will be used is: Sodium Thiosulphate + Hydrochloric Acid Na2S2O3 (aq) + 2HCl (aq) Sodium Chloride + Water + Sulphur Dioxide + 2NaCl (aq) + H2O (l) + SO2 (g) + Sulphur S (s) Two series of experiments will be carried out - one changing the temperature (while everything else remains constant) and one varying the concentration (while keeping everything else constant). Both the sodium thiosulphate and the Hydrochloric acid are soluble in water, so the concentration of either can be changed. However I have chosen to vary the sodium thiosulphate as it is available in larger amounts, and various concentrations are prepared. When the temperature is constant room temperature will be used as the temperature as it more practical and will not need to be monitored. When the temperature is being varied a...

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