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How does concentration affect the rate of a chemical reaction?
Member rating: No Rating | Words: | Submitted: Thu Jul 11 2002
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How does concentration affect the rate of a chemical reaction? Aim To find the effect of concentration on the rate of reaction, we will use the chemical reaction between sodium thiosulphate and hydrochloric acid to monitor how the reaction rate changes with different concentrations of the sodium thiosulphate. By varying the concentration of the sodium thiosulphate we can record the effect it has on the amount of time taken for the products to be produced. Na2S2O3 (aq) + 2HCl --> 2NaCl + S(s) + SO2 (g) + H2O (l) Sodium thiosulphate + hydrochloric acid --> sulphur + sodium chloride + sulphur dioxide + water Sulphur is an insoluble solid, so we are able to record the rate at which it is produced by timing how long it takes a cross underneath the container to disappear. Prediction I predict that as the concentration of sodium thiosulphate increases, the rate of reaction increases. I think the more diluted the...
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