Laboratory Assignment for Module 3: Reaction Rates

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Thomas Edison State College

General Chemistry II with Labs (CHE-122)

Section no.:

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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% H2O2

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% H2O2

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% H2O2

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% H2O2

 Slope:

 

Inverse Slope:

 

 

Table 2: 10 mL 0.5–1.0% IKI and 5 mL 3% H2O2

Slope:

 

Inverse Slope:

 

 

Table 3:10 mL 0.5–1.0% IKI and 5 mL 2.25% H2O2

Slope:

 

Inverse Slope:

 

 

Order of H2O2:

 

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 (iodine-potassium 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% H2O2 (mass/volume) solution? What is the molarity of 100.0 mL  of a 2.25% H2O2 (mass/volume) solution?  (6 points)

 

 

 

3.      When finding the order of H2O2, 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)

 

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