Chem 1332
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- Words: 292
- Pages: 2
View Attempt
1 of 2
https://scholar.uh.edu/webct/ViewStudentAttempt.dowebct?attempt=1770...
View Attempt 2 of 5 Title:
Chapter 16(2)
Started:
October 4, 2009 7:07 PM
Submitted:
October 4, 2009 7:15 PM
Time spent:
00:07:19
Total score: 3/3 = 100%
Total score adjusted by 0.0
Maximum possible score: 3
1. Mechanism and Rate Law 8 The proposed mechanism for a reaction is Cl2 + H2S => HCl + Cl+ + HS- Slow Cl+ + HS- => HCl + S
Fast
Which of the following would be a rate law for the reaction?
Student Response
Value
1. rate = k[Cl2]
0%
2. rate = k[Cl2][H2S]
100%
3. rate = k[H2S]
0%
4. rate = k[HCl][S]
0%
Correct Answer
Feedback
5. rate = 0% + [Cl ][HS ][HCl] Score:
1/1
2. Mechanism and Rate Law 5 The proposed mechanism for a reaction is 1. ClO-(aq) + H2O(l) => HClO(aq) + OH-(aq) SLOW 2. I-(aq) + HClO(aq) => HIO(aq) + Cl-(aq) FAST 3. OH-(aq) + HIO(aq) => H2O(l) + IO-(aq) FAST Which of the following would be a rate law for the reaction?
Student Response
Value
1. rate = k[ClO-][H2O]
100%
2. rate = k[I-][HClO]
0%
Correct Answer
Feedback
04-Oct-09 7:15 PM
View Attempt
2 of 2
https://scholar.uh.edu/webct/ViewStudentAttempt.dowebct?attempt=1770...
3. rate = k[OH-][HIO]
0%
4. rate = k[ClO-] 0% [H2O][I-] 5. rate = k[ClO-] 0% [H2O][I-][OH-] Score:
1/1
3. Arrhenius E 1 set of conditions A first order reaction has a rate constant of 0.882 at 28 o C. Given that the Arrhenius constant for the reaction is 7.80 x 1011 sec -1, calculate the value of the activation energy in KILOJOULES (enter answer in E format to 3 significant figures. Remember - 2.41 would be 2.41E0)
Student Response Answer 6.88E1 Score:
Value
Correct Answer
100%
68.8
1/1
Done
04-Oct-09 7:15 PM
1 of 2
https://scholar.uh.edu/webct/ViewStudentAttempt.dowebct?attempt=1770...
View Attempt 2 of 5 Title:
Chapter 16(2)
Started:
October 4, 2009 7:07 PM
Submitted:
October 4, 2009 7:15 PM
Time spent:
00:07:19
Total score: 3/3 = 100%
Total score adjusted by 0.0
Maximum possible score: 3
1. Mechanism and Rate Law 8 The proposed mechanism for a reaction is Cl2 + H2S => HCl + Cl+ + HS- Slow Cl+ + HS- => HCl + S
Fast
Which of the following would be a rate law for the reaction?
Student Response
Value
1. rate = k[Cl2]
0%
2. rate = k[Cl2][H2S]
100%
3. rate = k[H2S]
0%
4. rate = k[HCl][S]
0%
Correct Answer
Feedback
5. rate = 0% + [Cl ][HS ][HCl] Score:
1/1
2. Mechanism and Rate Law 5 The proposed mechanism for a reaction is 1. ClO-(aq) + H2O(l) => HClO(aq) + OH-(aq) SLOW 2. I-(aq) + HClO(aq) => HIO(aq) + Cl-(aq) FAST 3. OH-(aq) + HIO(aq) => H2O(l) + IO-(aq) FAST Which of the following would be a rate law for the reaction?
Student Response
Value
1. rate = k[ClO-][H2O]
100%
2. rate = k[I-][HClO]
0%
Correct Answer
Feedback
04-Oct-09 7:15 PM
View Attempt
2 of 2
https://scholar.uh.edu/webct/ViewStudentAttempt.dowebct?attempt=1770...
3. rate = k[OH-][HIO]
0%
4. rate = k[ClO-] 0% [H2O][I-] 5. rate = k[ClO-] 0% [H2O][I-][OH-] Score:
1/1
3. Arrhenius E 1 set of conditions A first order reaction has a rate constant of 0.882 at 28 o C. Given that the Arrhenius constant for the reaction is 7.80 x 1011 sec -1, calculate the value of the activation energy in KILOJOULES (enter answer in E format to 3 significant figures. Remember - 2.41 would be 2.41E0)
Student Response Answer 6.88E1 Score:
Value
Correct Answer
100%
68.8
1/1
Done
04-Oct-09 7:15 PM
