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How does temperature affect the rate of reaction between Hydrochloric acid and sodium thiosulphate solution.
Member rating: No Rating | Words: | Submitted: Mon Jan 05 2004
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Centre number: 49051 Candidate number: How does temperature affect the rate of reaction between Hydrochloric acid and sodium thiosulphate solution Prediction The prediction for this experiment is that when the temperature increases the time taken for the reaction to complete will decrease. I believe this will happen because of the collision theory. This states that when particles have more energy they collide more often and much harder and the reaction occurs at a faster rate. This can be done by increasing the temperature, concentration or surface area and also by adding a catalyst. In this experiment the temperature is the variable factor each time and as it increases the particles gain more energy to collide more often therefore increasing the rate of reaction. Results Starting Temperature (oC) Final Temperature (oC) Time Taken for reaction to complete (seconds) Rate of Reaction 15 16 77 0.012 20 21 45 0.022 Room Temperature (22) 25 32 0.031 30 33 22 0.045 35 37 20 0.05 40 44 13 0.077 45 47 12 0.083 50 52 10 0.1 Analysis These results show that as the temperature increases the rate at which the reaction occurs also increases....
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