DP Chemistry (last assessment 2024)

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Question 18M.3.sl.TZ1.a

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Date May 2018 Marks available [Maximum mark: 2] Reference code 18M.3.sl.TZ1.a
Level sl Paper 3 Time zone TZ1
Command term Discuss Question number a Adapted from N/A
a.
[Maximum mark: 2]
18M.3.sl.TZ1.a

Aluminium and high density polyethene (HDPE) are both materials readily found in the kitchen, for example as saucepans and mixing bowls respectively. In these applications it is important that they are impermeable to water.

Discuss, in terms of its structure, why an aluminium saucepan is impermeable to water.

[2]

Markscheme

«close packed» lattice of metal atoms/ions

no spaces for water molecules to pass though the structure

[2 marks]

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