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The Iodine Clock Reaction Experiment

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User Generated
Subject
Chemistry
School
San Diego State University
Type
Homework
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1
Experiment: Determine the Rate Law and Activation Energy of the Iodine Clock Reaction
Name
Institution
Course
Instructor
Date

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EXPERIMENT CONDITIONS AND OBSERVATIONS
Run#
[IO
3
]
0
[I
-
]
0
[H
+
]
o
[H
3
AsO
3
]
0
Temperatu
re (
O
C)
Time, t
c
(sec)
1
0.005
0.05
2 × 10
-5
0.0015
25
18.9
2
0.010
0.05
2 × 10
-5
0.0015
25
19.1
3
0.005
0.10
2 × 10
-5
0.0015
25
19.2
4
0.005
0.05
4 × 10
-5
0.0015
25
17.4
5
0.005
0.05
2 × 10
-5
0.0015
5
19.4
6
0.005
0.05
2 × 10
-5
0.0015
15
18.8
7
0.005
0.05
2 × 10
-5
0.0015
35
16.5
8
0.005
0.05
2 × 10
-5
0.0015
45
15.8
Table 1; Data conditions during the experiment
EXPERIMENT CONDITIONS AND CALCULATED INITIAL RATES
a) Effects of reagent concentration
#
[IO
3
]
0
[I
-
]
0
[H
+
]
o
Time (s)
Average time for
reaction (s)
Average Initial rate
(M/s )
1
0.005
0.05
2 × 10
-5
18.9
17.9
2.79 × 10
-5
2
0.010
0.05
2 × 10
-5
19.1
19.1
2.61 × 10
-5
3
0.005
0.10
2 × 10
-5
19.2
19.2
2.60 × 10
-5
4
0.005
0.05
4 × 10
-5
17.4
17.4
2.87 × 10
-5
5
0.005
0.05
2 × 10
-5
19.4
19.4
2.277 × 10
-5

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1 Experiment: Determine the Rate Law and Activation Energy of the Iodine Clock Reaction Name Institution Course Instructor Date 2 EXPERIMENT CONDITIONS AND OBSERVATIONS Run# [IO3]0 [I-]0 [H+]o 1 0.005 0.05 2 0.010 3 2 × 10-5 [H3AsO3]0 Temperatu re (OC) 0.0015 25 Time, tc (sec) 18.9 0.05 2 × 10-5 0.0015 25 19.1 0.005 0.10 2 × 10-5 0.0015 25 19.2 4 0.005 0.05 4 × 10-5 0.0015 25 17.4 5 0.005 0.05 2 × 10-5 0.0015 5 19.4 6 0.005 0.05 2 × 10-5 0.0015 15 18.8 7 0.005 0.05 2 × 10-5 0.0015 35 16.5 8 0.005 0.05 2 × 10-5 0.0015 45 15.8 Observation The reaction solution proceeds slowly at first but turns blue after 18.9 seconds. The reaction solution starts slowly but turns blue after 19.1 seconds. The reaction solution turns blue after 19.2 seconds. The reaction solution turns blue after 19.4 seconds. The reaction solution turns blue after 19.4 seconds. The reaction solution turns blue after 18.8 seconds. The reaction solution turns blue after 18.5 seconds. The reaction solution turns blue after 15.8 seconds. Table 1; Data conditions during the experiment EXPERIMENT CONDITIONS AND CALCULATED INITIAL RATES a) Effects of reagent concentration # [IO3]0 [I-]0 [H+]o Time (s) 1 0.005 0.05 2 × 10-5 2 0.010 0.05 3 0.005 4 5 18.9 Average time for reaction (s) 17.9 Average Initial rate (M/s ) 2.79 × 10-5 2 × 10-5 19.1 19.1 2.61 × 10-5 0.10 2 × 10-5 19.2 19.2 2.60 × 10-5 0.005 0.05 4 × 10-5 1 ...
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