An iodine-clock kinetics experiment was performed by varying the composition of reactant solutions and measuring the resulting rates of reaction. Trial 1 Trial 2 10.0 mL I¯(aq) 10.0 mL I¯(aq) Reactant solution A 5.0 mL S,0 (aq) 10.0 mL S,O (aq) 5.0 mL S,0 (aq) 5.0 mL S, 0 (aq) Reactant solution B 1.0 mL starch (aq) 1.0 mL starch (aq) Time to complete reaction 10 s 20 s How do trials 1 and 2 in the table differ? Trial 2 has twice as much S,O? as trial 1. Trial 1 has half as much starch as trial 2. Trial 2 has half as much S,O, as trial 1. Trial 1 has twice as much I- as trial 2. Four mechanisms have been proposed to explain the results in the table. Mechanism 1: I (aq) + I-(aq) L (aq) (slow) → L (aq) + S,0 (aq) → L (aq) + SO? (aq) (fast) Mechanism 2: I (aq) + S,0 (aq) → [S,O, · I]³ (aq) (slow) [S,O, · Ijš-(aq) +I(aq) → L,(aq) + 2 So (aq) (fast) > Mechanism 3: I (aq) + S,0; (aq)= [S,0, · I]3-(aq) (fast) [S,0, · IJ3-(aq) +I(aq) → L (aq) + 2 SO (aq) (slow) Mechanism 4: 21- (aq) + S,0 (aq) → 1, (aq) + 2 So (aq) Of the proposed mechanisms, which would be supported by the results in the table? O mechanism 1 O mechanism 2 mechanism 3 O mechanism 4 O O O O

An iodine-clock kinetics experiment was performed by varying the composition of reactant solutions and measuring the resulting rates of reaction. Trial 1 Trial 2 10.0 mL I¯(aq) 10.0 mL I¯(aq) Reactant solution A 5.0 mL S,0 (aq) 10.0 mL S,O (aq) 5.0 mL S,0 (aq) 5.0 mL S, 0 (aq) Reactant solution B 1.0 mL starch (aq) 1.0 mL starch (aq) Time to complete reaction 10 s 20 s How do trials 1 and 2 in the table differ? Trial 2 has twice as much S,O? as trial 1. Trial 1 has half as much starch as trial 2. Trial 2 has half as much S,O, as trial 1. Trial 1 has twice as much I- as trial 2. Four mechanisms have been proposed to explain the results in the table. Mechanism 1: I (aq) + I-(aq) L (aq) (slow) → L (aq) + S,0 (aq) → L (aq) + SO? (aq) (fast) Mechanism 2: I (aq) + S,0 (aq) → [S,O, · I]³ (aq) (slow) [S,O, · Ijš-(aq) +I(aq) → L,(aq) + 2 So (aq) (fast) > Mechanism 3: I (aq) + S,0; (aq)= [S,0, · I]3-(aq) (fast) [S,0, · IJ3-(aq) +I(aq) → L (aq) + 2 SO (aq) (slow) Mechanism 4: 21- (aq) + S,0 (aq) → 1, (aq) + 2 So (aq) Of the proposed mechanisms, which would be supported by the results in the table? O mechanism 1 O mechanism 2 mechanism 3 O mechanism 4 O O O O

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Question

An iodine-clock kinetics experiment was performed by varying the composition of reactant solutions and measuring the
resulting rates of reaction.
Trial 1
Trial 2
10.0 mL I¯(aq)
10.0 mL I¯(aq)
Reactant solution A
5.0 mL S,0 (aq)
10.0 mL S,O (aq)
5.0 mL S,O (aq)
5.0 mL S,0 (aq)
Reactant solution B
1.0 mL starch (aq)
1.0 mL starch (aq)
Time to complete reaction
10 s
20 s
How do trials 1 and 2 in the table differ?
Trial 2 has twice as much S, O? as trial 1.
Trial 1 has half as much starch as trial 2.
Trial 2 has half as much S,O as trial 1.
Trial 1 has twice as much I- as trial 2.
Four mechanisms have been proposed to explain the results in the table.
Mechanism 1:
I(aq) + I-(aq) →
→ L (aq)
(slow)
L (aq) + S,0 (aq) → L (aq) + SO? (aq)
(fast)
Mechanism 2:
I (aq) + S,0 (aq) → [S,0, · I]³ (aq)
(slow)
[S,O, · Ijš-(aq) +I(aq) → L, (aq) + 2 So (aq)
(fast)
Mechanism 3:
I (aq) + S,O (aq) = [S,0; · I]³¯(aq)
(fast)
[S,Og · Ij3-(aq) +I¯(aq)
L (aq) + 2 SO (aq)
(slow)
Mechanism 4:
21- (aq) + S,0 (aq) → 1, (aq) + 2 So (aq)
Of the proposed mechanisms, which would be supported by the results in the table?
mechanism 1
O mechanism 2
mechanism 3
mechanism 4
O O O O

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