There is an error in the rate-determining step of the following proposed mechanism.

Slow step: CH3 (g) + Cl2 (g) - CH3 (g) + HCl (9) and the rate rule is kz = [CH][CL]

Fast step: CH3 (g) + Cl2 (g) → CH2Cl (g) + Cr (g) and the rate rule is kz = [CH][CL]

Overall : CH2 (g) + 2Cl2 (g) - CH2Cl (g) + HCl (9) + Cr (9)

Which shows the correct rate-determining step for the mechanism?

O

CH (9) + 2Cl (9) - CH2Cl (9) + HCl (9) + C (g)

CHA (9) + Cl2 (g) → CH3 (g) + HCl (9) and the rate rule is ki = [CH][Cl]

CH (9) + Cl2 (g) → CH3CI (9) + Cr (g) and the rate rule is ka = [CH][Cl]

CH3 (9) + 2Cl2 (g) → CH2Cl (g) + Cr (g) and the rate rule is kz = [CH][Cl]

Sul

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Question

Fiona

Chemistry

1 May, 17:17

There is an error in the rate-determining step of the following proposed mechanism.

Slow step: CH3 (g) + Cl2 (g) - CH3 (g) + HCl (9) and the rate rule is kz = [CH][CL]

Fast step: CH3 (g) + Cl2 (g) → CH2Cl (g) + Cr (g) and the rate rule is kz = [CH][CL]

Overall : CH2 (g) + 2Cl2 (g) - CH2Cl (g) + HCl (9) + Cr (9)

Which shows the correct rate-determining step for the mechanism?

O

CH (9) + 2Cl (9) - CH2Cl (9) + HCl (9) + C (g)

CHA (9) + Cl2 (g) → CH3 (g) + HCl (9) and the rate rule is ki = [CH][Cl]

CH (9) + Cl2 (g) → CH3CI (9) + Cr (g) and the rate rule is ka = [CH][Cl]

CH3 (9) + 2Cl2 (g) → CH2Cl (g) + Cr (g) and the rate rule is kz = [CH][Cl]

Sul

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Answers (1)

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Nayeli Evans · Answer 1

The steps with correct mechanism are given below:

C

1) CH₄ (g) + Cl (g) → CH₃ (g) + HCl (g) : This is a slow step.

The rate is given as: R1 = k₁[CH₄][Cl]

2) CH₃ (g) + Cl₂ (g) → CH₃Cl (g) + Cl (g) : This is a fast step.

The rate is given as: Rate = k₂[CH₃][Cl₂]

∴ CH₄ (g) + Cl₂ (g) → CH₃Cl (g) + HCl (g)

Here, the slowest step will be the rate-determining step.