1. a. Calculate the rate constant at the higher temperature used in Experiment 4.

b. Calculate the activtion energy for the reaction.

c. What do your results demotrate about the effect of a catalyst on the rate of reaction.

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12 Fall 2013 3. The volumes of the solutions used in Experiment 4 will be the same as those used in Experiment 1. 5. Pipet the required volumes of the Nal, NaCl, Na₂S₂O3, starch, and K₂SO, solutions into test tube These volumes can be found in Table 2. 4. Place this test tube in the water bath. 6. Place about 5 mL of the K₂S₂Ox solution in the clean, dry test tube whose number is 0. Put this test tube in the water bath. 7. Allow each test tube to remain in the water bath for about 5 min. Add small amounts of hot water to the bath during this time to maintain the temperature at about 35°C. 8 Initiate the reaction by pipetting the required volume of the warm K₂S₂O, solution into the other test tube in the water bath. Note and record the time. 9 Insert a rubber stopper, remove the test tube from the bath, and shake the test tube as vigorously as you can for a few seconds. Replace the test tube in the bath. Be alert. 10 Note the time at which the dark color appears. Remove the stopper, and measure and record the temperature of the solution to the nearest tenth of a degree. Calculate the clapsed time. 11 The volumes of the solutions used in Experiment 5 will be the same as those used in Experiment 1, but do not heat the solutions. Add 1 drop of 0.2 M CuSO4 and shake the test tube gently before you initiate the reaction with the required volume of the K₂S₂Os solution. Table 2 Volume (mL) of Solutions 0.20 M 0.20 M Experiment Nal 4 0 5 2.0 0 NaCl 2.0 0 0 0.010 M 2% 0.20 M Na₂S₂O3 2.0 0 2.0 Starch K₂SO4 1.0 2.0 0 0 1.0 2.0 0.20 M K₂S208 -2,0 4.0 2.0 0.20 M CuSO4 0 0 Idrop 12 Fall 2013 3. The volumes of the solutions used in Experiment 4 will be the same as those used in Experiment 1. 5. Pipet the required volumes of the Nal, NaCl, Na₂S₂O3, starch, and K₂SO, solutions into test tube These volumes can be found in Table 2. 4. Place this test tube in the water bath. 6. Place about 5 mL of the K₂S₂Ox solution in the clean, dry test tube whose number is 0. Put this test tube in the water bath. 7. Allow each test tube to remain in the water bath for about 5 min. Add small amounts of hot water to the bath during this time to maintain the temperature at about 35°C. 8 Initiate the reaction by pipetting the required volume of the warm K₂S₂O, solution into the other test tube in the water bath. Note and record the time. 9 Insert a rubber stopper, remove the test tube from the bath, and shake the test tube as vigorously as you can for a few seconds. Replace the test tube in the bath. Be alert. 10 Note the time at which the dark color appears. Remove the stopper, and measure and record the temperature of the solution to the nearest tenth of a degree. Calculate the clapsed time. 11 The volumes of the solutions used in Experiment 5 will be the same as those used in Experiment 1, but do not heat the solutions. Add 1 drop of 0.2 M CuSO4 and shake the test tube gently before you initiate the reaction with the required volume of the K₂S₂Os solution. Table 2 Volume (mL) of Solutions 0.20 M 0.20 M Experiment Nal 4 0 5 2.0 0 NaCl 2.0 0 0 0.010 M 2% 0.20 M Na₂S₂O3 2.0 0 2.0 Starch K₂SO4 1.0 2.0 0 0 1.0 2.0 0.20 M K₂S208 -2,0 4.0 2.0 0.20 M CuSO4 0 0 Idrop

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NaI moles in 2 mL 0221000 00004 moles persulphate moles in 2mL 0221000 00004 ... View the full answer