Experiment 24 Prelaboratory Assignment
A Rate Law and Activation Energy
1. Three data plots are required for analyzing the data in this experiment, two plots from the kinetic trials outlined in Table 24.1 and one plot from Part E. From each data plot, a value is determined toward the completion of the analysis of the kinetic study for the reaction of r with H202. Complete the table in order to focus the analysis.
Source of Data y-axis label x-axis label Data to be obtained from the data plot
Table 24.1, trials 1-4
Table 24.1, trials 1, 5-7
Part E
2. a. In the collection of the rate data for the experiment, when do START TIME and STOP TIME occur for each kinetic trial in Table 24.1?
b. What is the color of the solution at STOP TIME?
c. What is the chemical reaction that accounts for the color of the solution at STOP TIME?
3. In the kinetic analysis of this experiment for the reaction of iodide ion with hydrogen peroxide, state the purpose for each of the following solutions (: a. deionized water
b. buffer solution
4. From the following data plot, calculate the activation energy, E„, for the reaction.
Arrhenius Plot for a Chemical Reaction
3.00 3.10 3.20 3.30 3.40 —5.50 —6.00 —6.50 —TOO ▪ —T50 E —8.00 —8.50 —9.00 —9.50 —10.00 111-(K) x 103
Experiment 24 287
