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The effect on the rate of reaction by changing the concentration of a reagent.
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The effect on the rate of reaction by changing the concentration of a reagent Introduction: The main objective in this investigation is to find out what effect an independent variable has on a reaction between hydrochloric acid and sodium thiosulphate. When sodium thiosulphate and hydrochloric acid react they produce a cloudy precipitate. Both of the solutions are clear yet react together and produce a yellow precipitate of sulphur. The equation for the reaction is as follows: Na2S2O3 + 2HCl 2NaCl + SO2 + S + H2O As the two substances react in the neutral medium of water the rate of reaction is easily observed by a disappearing cross placed underneath the beaker in which the sodium thiosulphate, hydrochloric acid and water react. Plan: First the apparatus (above) is to be set up, followed by the conduction of the experiment. There are a few variables that will not be changed purposely. These are called...
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