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Hayley Mitchell 27th April 10G3 Mrs Hewitt Chemistry Coursework- Sodiumthiosulphate and Hydrochloric acid experiment. Aim: To test what effect increasing the temperature of the Hydrochloric acid has on the reaction between Hydrochloric acid and Sodiumthiosulphate. Prediction: Na2S203 + 2Hcl --> S + 2NaCl + H2O + S02. I think that the higher the temperature, the faster the reaction will take place. I think this because there will be more activation energy in the particles of the two substances, which will mean that there is more chance of collision. With more collisions, the substances will react more often, and so cause the reaction rate to decrease. I think that the reaction will be almost directly proportional to the temperature. I doubt, however that if you double the temperature, the reaction rate will be double exactly. I think there will be quite a difference in the reaction rate if you double the temperature, but I I am...

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