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Kinetics of the Decomposition of Hydrogen Peroxide

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Experiment 2:

Kinetics of the Decomposition of Hydrogen Peroxide

 

Alejandra Valencia

Professor Concepcion

February 7, 2017

Chem. 216 T&TH

Introduction:    

In this experiment the rate of decomposition of hydrogen peroxide to form a gas will be studied. Because oxygen is not soluble in water, it can easily be trapped and used to indicate the extent of the reaction. In measuring the rate at which oxygen is evolved will demonstrate how the rate changes with varying initial concentrations of hydrogen peroxide. Through this, the reaction rate is how rapid a reaction occurs and is related to rates of change in concentration of reactants and product over time. Factors affecting the rate of a reaction is determined by the physical state of the reaction, presence of a catalyst, the concentration of the reactants and the temperature of the process (main focus of experiment). In this experiment, the rate law is used to define the experimentally determined relationship between reactant concentrations and the rate of the reaction.

Equations:

[pic 1]

[pic 2]

[pic 3]

Data and Results:

Table 1: Quantities Used in Experiment

Experiment 1

Experiment 2

Experiment 3

10 mL 0.10 M KI

10 mL 0.10 M KI

20 mL 0.10 M KI

15 mL H2O

10 mL H2O

5 mL H2O

5 mL 3% H2O2

10 mL 3% H2O2

5 mL 3% H2O2

[pic 4]

Experiment 1: Trial 1

Volume (mL)

Time (sec)

Total Time (sec)

2.0

0

0

4.0

73.20

73.20

6.0

66.00

139.20

8.0

71.40

210.60

10.0

68.40

279.00

12.0

60.00

339.00

14.0

63.00

402.00

[pic 5]

 

Experiment 1: Trial 2

Volume (mL)

Time (sec)

Total Time (sec)

2.0

0

0

4.0

63.00

63.00

6.0

66.00

129.00

8.0

64.20

193.20

10.0

63.60

256.80

12.0

69.00

325.80

14.0

67.20

393.00

[pic 6]

Experiment 2: Trial 1

Volume (mL)

Time (sec)

Total Time (sec)

2.0

0

0

4.0

38.78

38.78

6.0

45.02

83.80

8.0

26.80

110.60

10.0

27.71

138.31

12.0

34.97

173.28

14.0

31.58

204.86

[pic 7]

Experiment 2: Trial 2

Volume (mL)

Time (sec)

Total Time (sec)

2.0

0

0

4.0

43.85

43.85

6.0

38.81

82.66

8.0

32.96

115.62

10.0

45.30

160.92

12.0

41.23

202.15

14.0

31.88

234.03

[pic 8]

Experiment 3: Trial 1

Volume (mL)

Time (sec)

Total Time (sec)

2.0

0

0

4.0

53.67

53.67

6.0

40.76

94.43

8.0

32.13

126.56

10.0

39.43

165.99

12.0

35.49

201.48

14.0

43.25

244.73

...

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