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Investigate how the rate of reaction of sodium thiosulphate with hydrochloric acid changes with variation in the concentration of sodium thiosulphate.
Member rating: No Rating | Words: | Submitted: Mon Jun 28 2004
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Brief Aim The aim of the experiment is to investigate how the rate of reaction of sodium thiosulphate with hydrochloric acid changes with variation in the concentration of sodium thiosulphate. Background How the experiment works: Sodium thiosulphate solution reacts with hydrochloric acid, producing a precipitate of sulphur. The equation of the reaction is: Na2S203 + 2HCL = 2NaCl + SO2 + S + H20 (aq) (aq) (aq) (g) (s) (l) Sodium Hydrochloric Sodium Sulphur Sulphur Water Thiosulphate Acid Chloride Dioxide The rate of reaction can be followed by the time it takes for the solution to reach certain cloudiness. Preliminary Work The reaction produces a precipitate of sulphur, which is a solid. I will measure the rate of reaction by measuring the time the solution takes to reach a certain cloudiness. I conducted a preliminary experiment with 2 molar hydrochloric acid and 0.2 molar sodium thiosulphate. This showed that the solution took 34.8 seconds to reach an opaque...
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