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Lab 11 PostLab - Chemical Kinetics (Postlab)
Current Score : 23. Due : Saturday, June 22 2013 11:00 PM EDT
The due date for this assignment is past. Your work can be viewed below, but no changes can be made.
Important! Before you view the answer key, decide whether or not you plan to request an extension. Your Instructor may
not grant you an extension if you have viewed the answer key. Automatic extensions are not granted if you have viewed the
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1. 13.64/15 points | Previous Answers NCSUGenChem202LabV1 11.POST.01.
Refer to Data Table B, in which you entered rate constants. In the spaces below, enter your rate
constants, in M-1s-1. Do not include units.
0.0066 0.0066
0.0061 0.0061
0.0076 0.0076
0.0052 0.0052
0.0064 0.0064
What is the range of these values from highest to lowest?
0.0024 0.0024
What is the average of these values?
0.0064 0.0064
The remainder of this question is designed to help you decide if the data from one of your experiments
can be discarded.
To quantitatively "throw out" a measurement, you must perform a statistical test on your data called a
Q-Test. The formula for the Q-test is
Qcalculated = gap/range
where gap = (questionable value ! next closest number) and range = (largest number ! smallest
number).
Qcalculated is then compared to Qtable. If Qcalculated > Qtable then the questionable datum can be
discarded.
Q (90% confidence) number of measurements
0.76 4
0.64 5
Lab 11 PostLab - Chemical Kinetics (Postlab)
Current Score : 23. Due : Saturday, June 22 2013 11:00 PM EDT
The due date for this assignment is past. Your work can be viewed below, but no changes can be made.
Important! Before you view the answer key, decide whether or not you plan to request an extension. Your Instructor may
not grant you an extension if you have viewed the answer key. Automatic extensions are not granted if you have viewed the
answer key.
Request Extension
1. 13.64/15 points | Previous Answers NCSUGenChem202LabV1 11.POST.01.
Refer to Data Table B, in which you entered rate constants. In the spaces below, enter your rate
constants, in M-1s-1. Do not include units.
0.0066 0.0066
0.0061 0.0061
0.0076 0.0076
0.0052 0.0052
0.0064 0.0064
What is the range of these values from highest to lowest?
0.0024 0.0024
What is the average of these values?
0.0064 0.0064
The remainder of this question is designed to help you decide if the data from one of your experiments
can be discarded.
To quantitatively "throw out" a measurement, you must perform a statistical test on your data called a
Q-Test. The formula for the Q-test is
Qcalculated = gap/range
where gap = (questionable value ! next closest number) and range = (largest number ! smallest
number).
Qcalculated is then compared to Qtable. If Qcalculated > Qtable then the questionable datum can be
discarded.
Q (90% confidence) number of measurements
0.76 4
0.64 5
