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How do you dertermine the order with respect to [I-]

How do you dertermine the order with respect to [I-]

Introduction to General, Organic and Biochemistry
Introduction to General, Organic and Biochemistry
11th Edition
ISBN:9781285869759
Author:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar Torres
Publisher:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar Torres
Chapter6: Solutions And Colloids
Section: Chapter Questions
Problem 6.29P
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How do you dertermine the order with respect to [I-]

3. 4- 173 Table 12.2 Solutions for Kinetic Runs Run Flask A Flask B 250 mL beaker 10.00 mL 0.00500 M NażS2O3 5 drops starch 20.00 mL 0.200 M KI 20.00 mL 0.100 M K2S2O8 10.00 mL 0.100 M K2S2O8 10.00 mL 0.100 M NażSO4 10.00 mL 0.00500 M Na2S2O3 5 drops starch 20.00 mL 0.200 M KI 15.00 mL 0.100 M K2S2O8 5.00 mL 0.100 M Na2SO4 10.00 mL 0.00500 M Na2S2O3 5 drops starch 20.00 mL 0.200 M KI 10.00 mL 0.200 M KI 10.00 mL 0.200 KCI 10.00 mL 0.00500 M Na2S2O3 20.00 mL 0.100 M K2S½O8 5 drops starch 15.00 mL 0.200 M KI 10.00 mL 0.00500 M Na2S2O3 20.00 mL 0.100 M K2S2O8 5.00 mL 0.200 M KCI 5 drops starch For each of the above, measure the KI and the K2S½O8 precisely from the burets. The KCl and Na2SO4 solutions are added only to keep the total ionic concentration in each mixture the same. This is necessary to avoid secondary effects. 1. Calculate the initial concentrations of I, S,O2, and S,O, in each run using the data in Table 12.2 and the dilution formula M¡V] = M2V2, is as follows: - (0.200 M)(20.00 mL) =°[.1] (50.00 mL) -=0.0800 M (0.100 M)(20.00 mL) =0.0400 M (50.00 mL) (0.00500 M)(10.00 mL) ==0.00100 M (50.00 mL) 2. Calculate A[I2]. From the indicator reaction equation, the concentration of S203 is twice as great as the concentration of I2 produced in the time At. Therefore, the concentration of I2 produced in time At will be one-half the concentration of S2O3 initially present in the reaction solution. [S2O,?] = 1.00 x 10³ M; therefore A[L] = 5.00 x 10“ M 3. Normalize and then fill four burets: one with 0.200 M KI, one with 0.200 M KCI, one with 0.100 M K2S2O8 and the remaining one with 0.100 M Na2SO4. dependent on temp k At Rate (A[I2]/At) Run °L*O*s] [1] V [I] Units: 41.0s 0.0400 m h-01x 00 100m 0.0400 m 3. 8 2.0s 4. M 00100 0 (0.200 m)(20,0mL) (0.100m)(20.00 ml (o.050oml19:00 mil l All,] 2[$,0,], 00, 1. Determine the order with respect to [I]. 2. Determine the order with respect to [S2Og ].
Transcribed Image Text:3. 4- 173 Table 12.2 Solutions for Kinetic Runs Run Flask A Flask B 250 mL beaker 10.00 mL 0.00500 M NażS2O3 5 drops starch 20.00 mL 0.200 M KI 20.00 mL 0.100 M K2S2O8 10.00 mL 0.100 M K2S2O8 10.00 mL 0.100 M NażSO4 10.00 mL 0.00500 M Na2S2O3 5 drops starch 20.00 mL 0.200 M KI 15.00 mL 0.100 M K2S2O8 5.00 mL 0.100 M Na2SO4 10.00 mL 0.00500 M Na2S2O3 5 drops starch 20.00 mL 0.200 M KI 10.00 mL 0.200 M KI 10.00 mL 0.200 KCI 10.00 mL 0.00500 M Na2S2O3 20.00 mL 0.100 M K2S½O8 5 drops starch 15.00 mL 0.200 M KI 10.00 mL 0.00500 M Na2S2O3 20.00 mL 0.100 M K2S2O8 5.00 mL 0.200 M KCI 5 drops starch For each of the above, measure the KI and the K2S½O8 precisely from the burets. The KCl and Na2SO4 solutions are added only to keep the total ionic concentration in each mixture the same. This is necessary to avoid secondary effects. 1. Calculate the initial concentrations of I, S,O2, and S,O, in each run using the data in Table 12.2 and the dilution formula M¡V] = M2V2, is as follows: - (0.200 M)(20.00 mL) =°[.1] (50.00 mL) -=0.0800 M (0.100 M)(20.00 mL) =0.0400 M (50.00 mL) (0.00500 M)(10.00 mL) ==0.00100 M (50.00 mL) 2. Calculate A[I2]. From the indicator reaction equation, the concentration of S203 is twice as great as the concentration of I2 produced in the time At. Therefore, the concentration of I2 produced in time At will be one-half the concentration of S2O3 initially present in the reaction solution. [S2O,?] = 1.00 x 10³ M; therefore A[L] = 5.00 x 10“ M 3. Normalize and then fill four burets: one with 0.200 M KI, one with 0.200 M KCI, one with 0.100 M K2S2O8 and the remaining one with 0.100 M Na2SO4. dependent on temp k At Rate (A[I2]/At) Run °L*O*s] [1] V [I] Units: 41.0s 0.0400 m h-01x 00 100m 0.0400 m 3. 8 2.0s 4. M 00100 0 (0.200 m)(20,0mL) (0.100m)(20.00 ml (o.050oml19:00 mil l All,] 2[$,0,], 00, 1. Determine the order with respect to [I]. 2. Determine the order with respect to [S2Og ].
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