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Investigate the affect of temperature of sodium thiosulfate and hydrochloric acid against rates of reaction.
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| Submitted: Mon Apr 24 2006
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Affect of Temperature Preliminary Experiment For my first preliminary experiment, I had to investigate the affect of temperature of sodium thiosulfate and hydrochloric acid against rates of reaction. The chemical equation for this is: Sodium thiosulfate + hydrochloric acid sodium chloride + sulfur dioxide + sulfur + water Na2S2O3(aq) + HCL(aq) NaCl(aq) + SO2(aq) + S(s) + H2O(l) The solid sulfur (S(s)) formed in this reaction makes the colourless solution go cloudy. I used my preliminary results to give myself an idea of which temperature would give me the best results. For my preliminary results, I used 30 cm³ of sodium thiosulfate solution, 5 cm³ of Hydrochloric acid and 20 cm³ of distilled water. The variable that was changed was the temperatures. My preliminary results are in the table below: Temperature (°C) Time (seconds) 1 / time (s¯¹) 1 / time (s¯¹) x 100 22 61 0.016 1.6 36 24 0.042 4.2 38 20 0.05 5 39 25 0.04 4 46 17 0.5882 58.82 49 17 0.5882 58.82 54 9 0.0185 1.85 71 6 0.1667 16.67 From the table above, I can see that the 71°c temperature produced the...
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