In a study of nitrosyl halides, a chemist proposes the

Chapter 16, Problem 63P

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QUESTION:

In a study of nitrosyl halides, a chemist proposes the following mechanism for the synthesis of nitrosyl bromide:

If the rate law is \(\text { rate }=k[\mathrm{NO}]^{2}\left[\mathrm{Br}_{2}\right]\), is the proposed mechanism valid? If so, show that it satisfies the three criteria for validity.

Equation Transcription:

rate = 𝑘[NO]2[Br2]

Text Transcription:

rate = 𝑘[NO]^2[Br_2]

Questions & Answers

QUESTION:

In a study of nitrosyl halides, a chemist proposes the following mechanism for the synthesis of nitrosyl bromide:

If the rate law is \(\text { rate }=k[\mathrm{NO}]^{2}\left[\mathrm{Br}_{2}\right]\), is the proposed mechanism valid? If so, show that it satisfies the three criteria for validity.

Equation Transcription:

rate = 𝑘[NO]2[Br2]

Text Transcription:

rate = 𝑘[NO]^2[Br_2]

ANSWER:

Solution 63P

Here we have to explain the proposed mechanism is valid or not.

Step 1

In a study of nitrosyl halides, a chemist proposes the following mechanism for the synthesis of nitrosyl bromide:

NO (g) + Br2 (g) ⇄ NOBr2 (g) [fast]

NOBr2 (g) + NO (g) → 2NOBr (g) [slow]

In this question it has been given that the rate law is,  rate = k[NO]2[Br2]

1st we will write the overall reaction by adding the two given reactions as follows,

NO (g) + Br2 (g) ⇄ NOBr2 (g) [fast]

NOBr2 (g) + NO (g) → 2NOBr (g) [slow]


Overall reaction :                 2NO (g) + Br2

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