Chemistry: Matter and Change
1st Edition
ISBN: 9780078746376
Author: Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom
Publisher: Glencoe/McGraw-Hill School Pub Co
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Experiment for Kinetics – The Iodine Clock Reaction
Results A1: Trial 1: took 43.64 seconds to turn from clear to purple, trail 2: took 44.82 seconds to turn purple, trail 3: which was 47.49 seconds to turn purple, trail 4: was 45.23 seconds to turn purple again, and lastly trail 5: which was 43.63 seconds to turned from clear to purple.
Results A2: Trial 1: took 55.10 seconds to turn from clear to purple, trail 2: was 52.77 seconds to turn purple, trail 3: which was 44.67 seconds to turn purple, trail 4: was 59.69 seconds to turn purple again, and lastly trail 5: which was 54.88 seconds to turned from clear to purple.
Results A3: Trial 1: took 76 seconds to turn from clear to purple, trail 2: was 88 seconds to turn purple, trail 3: which was 102 seconds to turn purple, trail 4: was 82 seconds to turn purple again, and lastly trail 5: which was 93 seconds to turned from clear to purple.
Results A4: Trial 1: took 206.31 seconds to turn purple, trail 2: was 188.55 seconds to turn purple, trail 3: which was 177.13 seconds to turn purple, trail 4: was 199.36 seconds to turn purple again, and lastly trail 5: which was 172.56 seconds to turned from clear to purple.
a. Write the rate law for the reaction with the order of reaction with respect to [S2O82-] you determined in the planning questions and your determined order of I-.
b. Calculate the rate constant, k, for each trial by substituting in the appropriate concentration and rate values into your determined rate law.
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