Phosgene (COCI,) reacts with formaldehyde in the following reaction to produce dichloromethane and carbon dioxide: COCI, + CH,O → CH,Cl, + Co, P+F>D+C Activated charcoals have been found to catalyse this reaction at 170 °C (Ryan & Stacey, 1984). One possible mechanism by which the reaction is thought to occur is shown below: P+S P.S Egn 1 P.S + F C.S+D Egn 2 C.S- C+S Egn 3 a) What type of reaction is Eqn 2 in the mechanism? b) Write rate expressions (aka rate law aka isotherms) for all the reactions. c) What do you believe would be the rate limiting step? Use this to derive the rate law for the reaction. d) What is the best way to confirm the rate law you derived theoretically in c)?

Chemistry: The Molecular Science
5th Edition
ISBN:9781285199047
Author:John W. Moore, Conrad L. Stanitski
Publisher:John W. Moore, Conrad L. Stanitski
Chapter11: Chemical Kinetics: Rates Of Reactions
Section: Chapter Questions
Problem 83QRT
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Phosgene (COCI) reacts with formaldehyde in the following reaction to produce dichloromethane and
carbon dioxide:
CoCI, + CH;0 → CH;Cl, + CO,
P+F>D+C
Activated charcoals have been found to catalyse this reaction at 170 °C (Ryan & Stacey, 1984).
One possible mechanism by which the reaction is thought to occur is shown below:
P+s = P.S
Egn 1
P.S + Fie
1.
C.S +D Egn 2
C.S
C+S
Egn 3
a) What type of reaction is Eqn 2 in the mechanism?
b) Write rate expressions (aka rate law aka isotherms) for all the reactions.
c) What do you believe would be the rate limiting step? Use this to derive the rate law for the reaction.
d) What is the best way to confirm the rate law you derived theoretically in c)?
Transcribed Image Text:Phosgene (COCI) reacts with formaldehyde in the following reaction to produce dichloromethane and carbon dioxide: CoCI, + CH;0 → CH;Cl, + CO, P+F>D+C Activated charcoals have been found to catalyse this reaction at 170 °C (Ryan & Stacey, 1984). One possible mechanism by which the reaction is thought to occur is shown below: P+s = P.S Egn 1 P.S + Fie 1. C.S +D Egn 2 C.S C+S Egn 3 a) What type of reaction is Eqn 2 in the mechanism? b) Write rate expressions (aka rate law aka isotherms) for all the reactions. c) What do you believe would be the rate limiting step? Use this to derive the rate law for the reaction. d) What is the best way to confirm the rate law you derived theoretically in c)?
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