How does the change in temperature affect the rate of reaction?
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Introduction
Temperature affecting Reaction Rates * Guiding Question: How does the change in temperature affect the rate of reaction? * Objectives: The objective of this experiment is to see how temperature affects reaction rates. * Hypothesis: We think that temperature increases the rate of reaction because the increase in temperature increases the energy of the particles and therefore overcomes faster the activation energy. * Variables: 1. Independent: Temperature (�C) 2. Dependents: Time (s) and rate of reaction (s -1) 3. Control: Volume (ml) and concentration (M) of HCl and Na2S2O3. * Procedure: a) ...read more.
Middle
f) Repeat the experiment twice for each temperature and find the average. * Materials: i. 2 measuring cylinder (50 ml) ii. Thermometer 10 �C - 110 �C iii. Chronometer iv. 2 flasks (250 mL) v. 60 ml of a 2M solution of HCl vi. 600 ml of a 0.04 M solution of Na2S2O3 * Observation: Sodium Thiosulfate ions (0.04 M) with different temperatures �C mL HCL (2M) Time to disappear of "X" (s) Average Time (s) Rate of Reaction n (s-1) 18.5 5 243 255 249 0.00401 30 5 60 46 53 0.01886 40 5 28.62 25.04 26.83 0.03727 50 5 24.38 22.46 23.42 0.04269 60 5 10.87 14 12.44 0.08038 * ...read more.
Conclusion
Some problems during the experiment were that we just have one hot plate so we loose time waiting for the other team to finish with their results. It was complicated because we couldn't have enough space to record everything that was happening because there were two groups per table. A solution to this problem is that for that specific part when we need the hot plates, we can share the data obtained in the whole table members. So we can continued the experiment at a faster rate so we can start doing more researches for the conclusion. And in this way the observations would have been more accuracy for both groups. ...read more.
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