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Science Coursework Aim: To find out how much the concentration affects the reaction below. Thiosulphate ions + Hydrogen ions --> Sulphur dioxide + water + Sulphur List of Apparatus Sodium Thiosulphate Sulphuric acid Distilled water Measuring cylinders x2 Glass beaker x2 Stop Watch Prediction I think that the rate of reaction will increase slowly when the concentration of the sodium Thiosulphate solution decreases due to an increase amount in the distilled water. I think this will happen because the rate should rise as there is less acid to react with and the water will raise the reaction also. Planning There will be a number of things I will investigate during my investigation. These are the factors that I believe could affect the rate of reaction 1) Heat 2) Catalysts 3) Concentration 4) Surface Area I will need to measure the following items in my investigation. 1) The amount of sodium Thiosulphate 2) The amount of water 3) The amount of acid...

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