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2. Consider this two step mechanism for a reaction… Step 1     NO2     +     O3 --> NO3    ...

2. Consider this two step mechanism for a reaction…

Step 1     NO2     +     O3 --> NO3     +     O2 slow; rate determining step

Step 2     NO3     +     NO2 --> N2O5                                          fast

a. What is the overall reaction?

b. Identify the intermediates in the mechanism.

c. Write the rate law expression for each step of the mechanism including any reversible reactions.

c. What is the predicted rate law expression? Be sure to only list reactants from the overall equation and not intermediates in the rate law expression.

3. A proposed mechanism for the decomposition of ozone, O3, is as follows:

Step 1                          O3 -->/<-- O2     +      O fast

Step 2     O3     +     O --> 2O2                  slow

a. What is the overall reaction?

b. Identify the intermediates in the reaction mechanism.

c. Write a rate law expression for each step including any reversible reactions.

d. What is the predicted rate law expression? Be sure to only list reactants from the overall equation and not intermediates in the rate law expression.

4. Consider the following 3 step reaction mechanism:

Step 1                       H2 --->/<-- 2H                         fast

Step 2         H     +     CO --> HCO        slow

Step 3         H     +     HCO --> H2CO       fast

a. What is the overall reaction?

b. Identify the intermediates in the reaction mechanism.

c. Write a rate law expression for each step of the mechanism including any reversible reactions.

c. What is the predicted rate law expression? Be sure to only list reactants from the overall equation and not intermediates in the rate law expression.

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Answer #1

@ NO2 +03 - Nog toz - Nog two 2 Naos - 1 ¢ i tilna Noz toz t w/ two (soate determining step) (fast) I wo3 + O2 + N20 a Pro2 t

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