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Investigating the affect of concentration on the rate of reaction Introduction: This investigates how the rate of a chemical reaction depends on the concentration of reactants in the solution. This will be investigated with the following experiment in which dilute hydrochloric acid and sodium thiosulphate solutions are mixed. This forms insoluble sulphur and the mixture gradually becomes cloudy. If the concentration of the sodium thiosulphate concentration is varied, the rate of production of sulphur can …

…the conical flask more thoroughly after each experiment to remove all traces of sulphur that could affect the light getting through to the sensor on the next experiment, but it did not seem to affect our results. On the whole I do not think that our experiment was inaccurate and the computer method proved to be fairly easy when carrying out the experiment, and very easy when plotting the graph and making the results table.