Rate and Activation Energy of the Iodination
of Acetone
Hand-In, Chem 210L, Summer 2014
Name:
Partner:
See the attached rubric for more detailed information about grading.
1. (3 points) Include a table showing all of your initial concentrations for each reactant and show sample
calculations for each type of calculation you perform. As always (and so this statement applies to questions
2-4 also), calculations must be done in Microsoft Equation using complete units and explaining anything
that needs to be explained.
{Insert table here.}
{Insert sample calculations here.}
2. (9 points) Based upon your data and observations, determine the correct rate law expression for this reaction
using whole number exponents. This will involve determining the rates, the order with respect to each
reactant and the rate constants. Explain the steps in the process and show sample calculations for each step.
Be sure to report the numeric value of the rate constant with units for the different temperatures you ran the
experiment at. Report the room temperature rate constant as an average of the room temperature runs and
include the numeric error (± some number).
{Type answer here including sample calculations and text as appropriate.}
3. (4 points) Based upon your data, calculate exact values for the order of the reaction with respect to each
reactant.
How do these values compare to the whole number values determined in #2? What does this tell you about
the error in the experiment? What are some likely sources of error in this experiment?
{Insert sample calculations here.}
{Insert discussion here.}
4. (4 points) Using data from your room temperature and variable temperature runs calculate the value of the
activation energy for this reaction using both the two-point form of the Arrhenius equation and the linear
Arrhenius equation/graphical approach. When you are done you should have 4 values for the activation
energy and should average them and include the numeric error (± some number) in your final answer.
{Insert sample calculations here}
See the attached rubric on the next page for more detailed information about grading.
Unsatisfactory
Borderline
Mistakes in
calculations.
Q #1
[Init.]
No sample
calculations or
Microsoft Equation
not used.
1 point
Mistakes in
calculations.
Q #2
Rates
0 points
No sample
calculations or
Microsoft Equation
not used.
1 point
Mistakes in
calculations.
Q #2
Orders
0 points
No sample
calculations or
Microsoft Equation
not used.
0 points
No sample
calculations or
Microsoft Equation
not used.
1 point
Mistakes in
calculations.
0 points
No sample
calculations or
Microsoft Equation
not used.
1 point
Mistakes in
calculations.
0 points
No sample
calculations or
Microsoft Equation
not used.
1-2 points
Mistakes in
calculations.
0 points
1-2 points
Q #2
Rate
Const.
Q #3
Calc.
Orders
Q #4
Ea
Total
Satisfactory
Incorrect or no use of
units.
Excellent
Score
Clear, correct calculations
with proper use of units.
3 pts.
2 points
Incorrect or no use of
units.
3 points
Clear, correct calculations
with proper use of units.
3 pts.
2 points
Incorrect or no use of
units.
3 points
Clear, correct calculations
with proper use of units.
3 pts.
2 points
Incorrect or no use of
units or no calculation
of error.
3 points
Clear, correct calculations
with proper use of units
and determination of error
for rate constant.
2 points
No discussion of error
or incorrect use of units.
3 points
Clear, correct calculations
with proper use of units,
3pts.
Discussion of error, 1 pt.
3 points
Incorrect or no use of
units or no calculation
of error.
4 points
Clear, correct calculations
with proper use of units
and determination of error
for Ea.
3 points
4 points
3 pts.
4 pts.
4 pts.
20 pts