Practice lab work Practice for a Kinetics of the lodine-Clock ReactionNa2S2O3(0.005M)Run 1Run 2Run 3Run 4Quantity.[Na2S2O3] stock[KI] stock[H202] stockk'Run#12341drops1drops1drops1 dropValue5.00*10^-32.00 * 10^-11.00* 10^-30.0289Trial 1 (s)0:340:071:110:12KI(0.1M)2 dropsOdrops0 drops0 dropsTrial 1 (s)0:320:061:010:10Trial 1 (s)0:320:050:590:17KI(0.2M)0 drops2 drops2 drops2 dropsTrial 1 (s)0:230:041:060:09H2O2(0.05M)0 drops0 drops1 drops0 dropTrial 1 (s)0:140:301:130:13H2O2(0.1M)2 drops2 drops0 drops1 drop Run 1Run 2Run 3Run 4Average time (s)[H₂O₂]0 (M)Table 2: Pseudo-rate constants from experimental dataRun 1Run 2Run 3Run 4[I]o (M)Average:[S₂O3²-10 (M)k' (indicate units)Average Rate ofReaction (M/s)

Concept Introduction: The reaction of H2O2 with KI in the presence of an acid: The I2 produced is…

Answered: Practice for a Kinetics of the…

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Chemistry

Practice for a Kinetics of the lodine-Clock Reaction

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter8: Sampling, Standardization, And Calibration

Section: Chapter Questions

Problem 8.19QAP

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Question

Practice lab work

Practice for a Kinetics of the lodine-Clock Reaction
Na2S2O3(0.005M)
Run 1
Run 2
Run 3
Run 4
Quantity.
[Na2S2O3] stock
[KI] stock
[H202] stock
k'
Run#
1
2
3
4
1drops
1drops
1drops
1 drop
Value
5.00*10^-3
2.00 * 10^-1
1.00* 10^-3
0.0289
Trial 1 (s)
0:34
0:07
1:11
0:12
KI(0.1M)
2 drops
Odrops
0 drops
0 drops
Trial 1 (s)
0:32
0:06
1:01
0:10
Trial 1 (s)
0:32
0:05
0:59
0:17
KI(0.2M)
0 drops
2 drops
2 drops
2 drops
Trial 1 (s)
0:23
0:04
1:06
0:09
H2O2(0.05M)
0 drops
0 drops
1 drops
0 drop
Trial 1 (s)
0:14
0:3
01:13
0:13
H2O2(0.1M)
2 drops
2 drops
0 drops
1 drop

Run 1
Run 2
Run 3
Run 4
Average time (s)
[H₂O₂]0 (M)
Table 2: Pseudo-rate constants from experimental data
Run 1
Run 2
Run 3
Run 4
[I]o (M)
Average:
[S₂O3²-10 (M)
k' (indicate units)
Average Rate of
Reaction (M/s)

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Calculate the initial [S₂O32] on the paper ([S₂O32-10), assuming the amount of S₂O3² you added
initially was diluted through the total volume of all reagents added to the paper:

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