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Investigate the effect of concentration upon the rate of reaction.
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Sodium Thiosulphate Coursework Planning Aim: To investigate the effect of concentration upon the rate of reaction. Reation=Sodium Thiosulphate + Hydrochloric Acid Na2S2O3 (aq) + 2HCl (aq) Sodium Chloride + Water + Sulphur Dioxide + Sulpher 2NaCl (aq) + H2O (l) + SO2 (g) + S(s) The experiment will be carried out varying the concentration. 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. I have also varied the amount of water in the solution in relation to the amount of sodium thiosulphate to help find reliable results. I decided which concentrations to use during my preliminary series of experiments 10cm3 of HCl (acid concentration will be fixed) 10-40g cm3 of sodium thiosulphate (all of these concentrations will be tested in turn...
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