Experiment for Kinetics – The Iodine Clock Reaction First part: 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. Second part: Results A1+B in 10 degree: Trial 1: it took 200.4 seconds to turn from clear to purple, trail 2: was 245.4 seconds to turn purple, trail 3: it took 202.8 seconds to turn purple, and trail 4: was 206.4 seconds to turned from clear and purple. Results A2+B in 25 degree: Trial 1: it took 87.7 seconds to turn from clear to purple, trail 2: was 84.36 seconds to turn purple, trail 3: it took 89.51 seconds to turn purple, and trail 4: was 85.54 seconds to turned from clear and purple. Results A3+B of 35 degrees: Trial 1: it took 32.19 seconds to turn from clear to purple after 35 degrees in a hot water bath, trail 2: after in a 35 degrees hot bath was 35.88 seconds to turn purple, trail 3: which was 37.61 seconds to turn purple after a in a hot bath of 35 degrees, and trail 4: was 41.34 seconds to turned from clear and purple after 35 degrees in a water bath. Results A4+B in 45 degree: Trial 1: it took 18.08 seconds to turn from clear to purple, trail 2: was 14.32 seconds to turn purple, trail 3: it took 19.45 seconds to turn purple, and trail 4: was 22.77 seconds to turned from clear and purple. a) What trends did you observe in your reaction rates when varying the concentration of I- in the reaction? Is this consistent with what you would expect? Explain. b)Explain the effect of concentration on reaction rate in terms of collisions between molecules by filling in the blanks to complete the statement: When the concentration of reactants increases, the reaction time _______________, because increasing the _______________ of molecules or ions in solution increases the rate of _______________ between them.
Experiment for Kinetics – The Iodine Clock Reaction
First part:
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.
Second part:
Results A1+B in 10 degree: Trial 1: it took 200.4 seconds to turn from clear to purple, trail 2: was 245.4 seconds to turn purple, trail 3: it took 202.8 seconds to turn purple, and trail 4: was 206.4 seconds to turned from clear and purple.
Results A2+B in 25 degree: Trial 1: it took 87.7 seconds to turn from clear to purple, trail 2: was 84.36 seconds to turn purple, trail 3: it took 89.51 seconds to turn purple, and trail 4: was 85.54 seconds to turned from clear and purple.
Results A3+B of 35 degrees: Trial 1: it took 32.19 seconds to turn from clear to purple after 35 degrees in a hot water bath, trail 2: after in a 35 degrees hot bath was 35.88 seconds to turn purple, trail 3: which was 37.61 seconds to turn purple after a in a hot bath of 35 degrees, and trail 4: was 41.34 seconds to turned from clear and purple after 35 degrees in a water bath.
Results A4+B in 45 degree: Trial 1: it took 18.08 seconds to turn from clear to purple, trail 2: was 14.32 seconds to turn purple, trail 3: it took 19.45 seconds to turn purple, and trail 4: was 22.77 seconds to turned from clear and purple.
a) What trends did you observe in your reaction rates when varying the concentration of I- in the reaction? Is this consistent with what you would expect? Explain.
b)Explain the effect of concentration on reaction rate in terms of collisions between molecules by filling in the blanks to complete the statement: When the concentration of reactants increases, the reaction time _______________, because increasing the _______________ of molecules or ions in solution increases the rate of _______________ between them.
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