How to deduce the polymerisation reaction for any alkene
2 marks · EasyA polymer is formed by the addition polymerisation of chloroethene. Each repeat unit in the polymer has the formula .
Calculate the total number of chlorine atoms in the polymer when it consists of 200 repeat units.
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200 (±0)
Common mistakes: Multiplying by 2 (thinking both carbons have chlorine); Giving just the number of repeat units, not the total Cl atoms
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Marking points
M1 · 1 mark · States or uses that there is 1 Cl atom per repeat unit.
A1 · 1 mark · Correctly calculates 1 x 200 = 200 chlorine atoms.
Worked solution
Each repeat unit of contains 1 chlorine atom.
Total chlorine atoms = 1 chlorine atom per unit 200 units = 200.