(a) Dichloromethane, CH2 Cl2 , is one of the products formed when chloromethane, CH3 Cl1 , reacts with chlorine. (i) Name the type of mechanism involved in this reaction and write an equation for each of the steps named below. Name of type of mechanism ............................................................................... Initiation step ............................................................................................................................ First propagation step ............................................................................................................................ Second propagation step ............................................................................................................................ (ii) Write an overall equation for the formation of dichloromethane from chloromethane. ...........................................................................................................................(5) (b) A compound contains 10.1% carbon and 89.9% chlorine by mass. Calculate the molecular formula of this compound, given that its relative molecular mass (Mr) is 237.0 ..................................................................................................................................... ..................................................................................................................................... ..................................................................................................................................... .....................................................................................................................................(3) (c) Suggest the formulae of two bromine-containing organic compounds formed when dibromomethane, CH2 Br2, reacts with bromine. Compound 1 ............................................................................................................... Compound 2 ..............................................................................................................(2)

(a) Dichloromethane, CH2 Cl2 , is one of the products formed when chloromethane, CH3 Cl1 , reacts with chlorine. (i) Name the type of mechanism involved in this reaction and write an equation for each of the steps named below. Name of type of mechanism ............................................................................... Initiation step ............................................................................................................................ First propagation step ............................................................................................................................ Second propagation step ............................................................................................................................ (ii) Write an overall equation for the formation of dichloromethane from chloromethane. ...........................................................................................................................(5) (b) A compound contains 10.1% carbon and 89.9% chlorine by mass. Calculate the molecular formula of this compound, given that its relative molecular mass (Mr) is 237.0 ..................................................................................................................................... ..................................................................................................................................... ..................................................................................................................................... .....................................................................................................................................(3) (c) Suggest the formulae of two bromine-containing organic compounds formed when dibromomethane, CH2 Br2, reacts with bromine. Compound 1 ............................................................................................................... Compound 2 ..............................................................................................................(2)

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 70QRT

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Question

(a) Dichloromethane, CH₂ Cl₂ , is one of the products formed when chloromethane, CH₃ Cl₁
, reacts with
chlorine.
(i) Name the type of mechanism involved in this reaction and write an equation for each of the steps
named below.
Name of type of mechanism ...............................................................................
Initiation step
............................................................................................................................
First propagation step
............................................................................................................................
Second propagation step
............................................................................................................................
(ii) Write an overall equation for the formation of dichloromethane from chloromethane.
...........................................................................................................................(5)
(b) A compound contains 10.1% carbon and 89.9% chlorine by mass. Calculate the molecular formula of
this compound, given that its relative molecular mass (Mr) is 237.0
.....................................................................................................................................
.....................................................................................................................................
.....................................................................................................................................
.....................................................................................................................................(3)
(c) Suggest the formulae of two bromine-containing organic compounds formed when dibromomethane,
CH₂ Br₂, reacts with bromine.
Compound 1 ...............................................................................................................
Compound 2 ..............................................................................................................(2)

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