Chapter6: Random Errors In Chemical Analysis
Section: Chapter Questions
Problem 6.22QAP
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Question
How can we calculate the time in minutes?
![hemistry 106
Run 1
time, s
0
150
300
450
600
750
950
1250
1550
--
Run 2
A
0.607
0.504
0.427
0.357 450
0.305 600
0.271 750
0.214 950
0.151
1250
0.103
1550
Run
1
2
3
4
5
Table 20.1: Data
Run 3
time, s
A
0
0.607
0
150
0.524
300
300 0.412
600
0.361
900
0.299 1200
0.253
1800
0.201
2400
0.147
3000
0.104
3600
time, s
Table 20.2: Conditions
[Fe(phen) 32+]0, M
7.5 x 10-5
7.5 x 10-5
7.5 x 10-5
7.5 x 10-5
7.5 x 10-5
A
time, s
A
0.601
0
0.611
0.565
50
0.513
0.529 100
0.425
0.498
150
0.298
0.472 200
0.227
0.413 250 0.175
0.356 300
0.149
0.333
350
0.118
0.283 400
0.101
Run 4
[H₂SO4]0, M
0.50
0.050
0.50
0.50
0.50
cus Questions:
1. What is the rate law for the dissociation of ferroin?
2. What might be the reaction mechanism?
3. What is the activation energy for this reaction?
Run 5
time, s
0
10
20
30
40
50
60
70
80
T, °C
40.0
40.0
30.0
50.0
60.0
158
A
0.606
0.515
0.426
0.343
0.311
0.2
0.221
0.163
0.119](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F9437567b-8da5-455d-a4fe-2bd0f454b63f%2F8ee19aed-429f-499c-83ee-dd9e02523537%2Fvwf4wso_processed.jpeg&w=3840&q=75)
Transcribed Image Text:hemistry 106
Run 1
time, s
0
150
300
450
600
750
950
1250
1550
--
Run 2
A
0.607
0.504
0.427
0.357 450
0.305 600
0.271 750
0.214 950
0.151
1250
0.103
1550
Run
1
2
3
4
5
Table 20.1: Data
Run 3
time, s
A
0
0.607
0
150
0.524
300
300 0.412
600
0.361
900
0.299 1200
0.253
1800
0.201
2400
0.147
3000
0.104
3600
time, s
Table 20.2: Conditions
[Fe(phen) 32+]0, M
7.5 x 10-5
7.5 x 10-5
7.5 x 10-5
7.5 x 10-5
7.5 x 10-5
A
time, s
A
0.601
0
0.611
0.565
50
0.513
0.529 100
0.425
0.498
150
0.298
0.472 200
0.227
0.413 250 0.175
0.356 300
0.149
0.333
350
0.118
0.283 400
0.101
Run 4
[H₂SO4]0, M
0.50
0.050
0.50
0.50
0.50
cus Questions:
1. What is the rate law for the dissociation of ferroin?
2. What might be the reaction mechanism?
3. What is the activation energy for this reaction?
Run 5
time, s
0
10
20
30
40
50
60
70
80
T, °C
40.0
40.0
30.0
50.0
60.0
158
A
0.606
0.515
0.426
0.343
0.311
0.2
0.221
0.163
0.119
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