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Edexcel A-Level Chemistry AS 5.7 The Addition Polymerisation of Alkenes and Draw the Repeat Unit Given the Monomer and Vice Versa Questions

Practise converting alkene monomers into addition polymers and working backwards from repeat units to monomer structures.

Syllabus
First assessment 2019
Course
Chemistry YCH11
Level
AS

Exam points

  • draw repeat units with brackets, extension bonds and n from named alkene monomers
  • identify the alkene monomer by restoring the C=C bond across the polymer repeat unit
  • write balanced addition polymerisation equations for monomers

Edexcel A-Level Chemistry AS 5.7 The Addition Polymerisation of Alkenes and Draw the Repeat Unit Given the Monomer and Vice Versa Questions question 1

[Maximum number: 3]

This question is about alkenes.

Question (a)

(a)

The repeat unit of the polymer polyisoprene is shown.

Figure for Question (a) — Edexcel A-Level Chemistry AS

polyisoprene

[ 3 ]

Question (i)

(i)

Draw the skeletal formula of the monomer of polyisoprene.

[ 1 ]

Question (ii)

(ii)

A sample of polyisoprene has a relative molecular mass of 50250 . Calculate the number of repeat units in the sample.

[ 2 ]
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