K-4 Reaction Mechanisms Flashcards Preview

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Flashcards in K-4 Reaction Mechanisms Deck (16):
1

The following 2 step reaction mechanism has been proposed.

 Step 1)  NO2Cl  → NO2 + Cl (slow)

Step 2)  NO2Cl + Cl  NO2 + Cl2 (fast)

What is the overall reaction for this mechnism?

Overall Reaction:  2NO2Cl(g) → 2NO2(g) + Cl2(g)

2

The following 2 step reaction mechanism has been proposed.

 Step 1)  NO2Cl  → NO2 + Cl (slow)

Step 2)  NO2Cl + Cl  → NO2 + Cl2 (fast)

What reaction intermediates, if any, are present?

Cl is the intermediate

3

The following 2 step reaction mechanism has been proposed.

 Step 1)  NO2Cl  → NO2 + Cl (slow)

Step 2)  NO2Cl + Cl  → NO2 + Cl2 (fast)

What catalysts, if any, are present?

There are no catalysts

4

The following 2 step reaction mechanism has been proposed.

 Step 1)  NO2Cl  → NO2 + Cl (slow)

Step 2)  NO2Cl + Cl  → NO2 + Cl2 (fast)

What is the rate law for the mechanism?

Based on slow step - Rate1 = k1[NO2Cl]

1st order based on molecularity

5

The following 2 step reaction mechanism has been proposed.

Step 1) O3 + NO2 → NO3 + O2 (slow)

Step 2) NO3 + NO2 → N2O5 (fast)

What is the overall reaction for this meachnism?

Overall Reaction:  O3(g) + 2NO2(g) → O2(g) + N2O5(g)

6

The following 2 step reaction mechanism has been proposed.

Step 1) O3 + NO2 → NO3 + O2 (slow)

Step 2) NO3 + NO2 → N2O5 (fast)

What reaction intermediates, if any, are present?

NO3 is a reaction intermediate

7

The following 2 step reaction mechanism has been proposed.

Step 1) O3 + NO2 → NO3 + O2 (slow)

Step 2) NO3 + NO2 → N2O5 (fast)

What catalysts, if any, are present?

There are no catalysts.

8

The following 2 step reaction mechanism has been proposed.

Step 1) O3 + NO2 → NO3 + O2 (slow)

Step 2) NO3 + NO2 → N2O5 (fast)

What is the rate law for the mechanism?

Based on slow step Rate1 = k1[O3]{NO2]

2nd order based on molecularity

9

The following 2 step reaction mechanism has been proposed.

Step 1)  O3 + NO → NO2 + O2 (slow)

Step 2)  NO2 + O → NO + O2 (fast)

What is the overall reaction for this mechanism?

 

Overall Reaction:  O3(g) + O(g) → 2O2(g)

10

The following 2 step reaction mechanism has been proposed.

Step 1)  O3 + NO → NO2 + O2 (slow)

Step 2)  NO2 + O → NO + O2 (fast)

What reaction intermediates, if any, are present?

 

NO2 is a reaction intermediate

11

The following 2 step reaction mechanism has been proposed.

Step 1)  O3 + NO → NO2 + O2 (slow)

Step 2)  NO2 + O → NO + O2 (fast)

What catalysts, if any, are present?

 

NO is a catalyst

12

The following 2 step reaction mechanism has been proposed.

Step 1)  O3 + NO → NO2 + O2 (slow)

Step 2)  NO2 + O → NO + O2 (fast)

What is the rate law for the mechanism?

 

Based on the slow step Rate1 = k1[O3][NO]

2nd order based on molecularity

13

The following 2 step reaction mechanism has been proposed.

Step 1: Fe3+ (aq) + 2I- (aq)→ Fe2+ (aq) + I2 (s) 
Step 2: S2O82- (aq) + Fe2+ (aq) → 2SO42- (aq) + Fe3+ (aq)

What is the overall reaction for this mechanism?

Overall Reaction:  2I- (aq) + S2O82- (aq) → I2 (s) + 2SO42- (aq)

14

The following 2 step reaction mechanism has been proposed.

Step 1: Fe3+ (aq) + 2I- (aq)→ Fe2+ (aq) + I2 (s) 
Step 2: S2O82- (aq) + Fe2+ (aq) → 2SO42- (aq) + Fe3+ (aq)

What reaction intermediates, if any, are present?

Fe2+ is a reaction intermediate

15

The following 2 step reaction mechanism has been proposed.

Step 1: Fe3+ (aq) + 2I- (aq)→ Fe2+ (aq) + I2 (s) 
Step 2: S2O82- (aq) + Fe2+ (aq) → 2SO42- (aq) + Fe3+ (aq)

What catalysts, if any, are present?

Fe3+ is a catalyst

16

The following 2 step reaction mechanism has been proposed.

Step 1: Fe3+ (aq) + 2I- (aq)→ Fe2+ (aq) + I2 (s) 
Step 2: S2O82- (aq) + Fe2+ (aq) → 2SO42- (aq) + Fe3+ (aq)

What is the rate law for the mechanism?

Based on the slow reaction Rate1 = k1[Fe3+][I-]2

3rd order based on molecularity