IB Chemistry SL 2.4.5 Addition Polymers

Practise converting an alkene monomer into an addition-polymer repeat unit and reversing the process. Open the carbon-carbon double bond, preserve substituent positions, include…

Syllabus
First assessment 2025
Objective
2.4.5
Level
SL

Exam points

  • open the monomer's C=C bond and draw the substituted two-carbon repeat unit
  • show brackets, continuation bonds and n correctly for an addition-polymer structure
  • recover the original alkene monomer by restoring a double bond in the repeat unit

2.4.5—Addition polymers question 1

[Maximum number: 3]

Phenylethene (styrene) is produced from ethylbenzene in a gas-phase equilibrium.

Figure for Question 2.4.5—Addition polymers question 1 — IB Chemistry SL

Question (a)

(a)

Complete the diagram to show the repeating unit of polystyrene.

Figure for Question (a) — IB Chemistry SL
[ 2 ]

Question (b)

(b)

State the type of polymerization that occurs.

[ 1 ]
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