Laboratory assignment for module 3: reaction rates
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Thomas Edison State College
General Chemistry II with Labs (CHE122)
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LABORATORY REPORT
Laboratory Assignment for Module 3: Reaction Rates
(eScience Lab 4 [16])
I. PURPOSE (10 POINTS)
II. TEST DATA (15 POINTS)
Table 1. 10 mL Undiluted IKI and 5 mL 3% H_{2}O_{2}
Water displaced in milliliters 
Time in seconds 
2 mL 

4 mL 

6 mL 

8 mL 

10 mL 

12 mL 

14 mL 

16 mL 

18 mL 

20 mL 

22 mL 

_{ }
Table 2. 10 mL 0.5–1.0% IKI and 5 mL 3% H_{2}O_{2}
Water displaced in milliliters 
Time in seconds 
2 mL 

4 mL 

6 mL 

8 mL 

10 mL 

12 mL 

14 mL 

16 mL 

18 mL 

20 mL 

22 mL 

Table 3. 10 mL 0.5–1.0% IKI and 5 mL 2.25% H_{2}O_{2}
Water displaced in milliters 
Time in seconds 
2 mL 

4 mL 

6 mL 

8 mL 

10 mL 

12 mL 

14 mL 

16 mL 

18 mL 

20 mL 

22 mL 

III. CALCULATIONS (20 POINTS)
Table 1: 10 mL Undiluted IKI and 5 mL 3% H_{2}O_{2}
Slope:
Inverse Slope:
Table 2: 10 mL 0.5–1.0% IKI and 5 mL 3% H_{2}O_{2}
Slope:
Inverse Slope:
Table 3:10 mL 0.5–1.0% IKI and 5 mL 2.25% H_{2}O_{2}
Slope:
Inverse Slope:
Order of H_{2}O_{2}:
Order of IKI:
Rate law constant:
*Show Calculations and Include Graphs
IV. RESULTS (15 POINTS)
Overall rate law:
IV. CONCLUSION (10 POINTS)
V. QUESTIONS (30 POINTS)
1. How many grams of IKI (iodinepotassium iodide; molar mass = 166.0 g/mol) would it take to obtain a 100.0 mL solution of 0.300 M IKI? How many grams of IKI would it take to create a 100.0 mL solution of 0.600 M IKI? (6 points)
2. What is the molarity of 100.0 mL of a 3.0% H_{2}O_{2} (mass/volume) solution? What is the molarity of 100.0 mL of a 2.25% H_{2}O_{2} (mass/volume) solution? (6 points)
3. When finding the order of H_{2}O_{2}, why was Trial 1 and Trial 3 used? (6 points)
4. When finding the order of IKI, why was Trial 1 and Trial 2 used? (6 points)
5. How does temperature affect the reaction rate? Explain in terms of the collision theory.
(6 points)