DP Chemistry (last assessment 2024)

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Question 18M.3.sl.TZ2.a

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Date May 2018 Marks available [Maximum mark: 2] Reference code 18M.3.sl.TZ2.a
Level sl Paper 3 Time zone TZ2
Command term Distinguish Question number a Adapted from N/A
a.
[Maximum mark: 2]
18M.3.sl.TZ2.a

Inductively Coupled Plasma (ICP) used with Mass Spectrometry (MS) or Optical Emission Spectrometry (OES) can be used to identify and quantify elements in a sample.

ICP-OES/MS can be used to analyse alloys and composites. Distinguish between alloys and composites.

[2]

Markscheme

Alloy:

mixture of metal with other metals/non-metals

OR

mixture of elements that retains the properties of a metal

 

Composite:

reinforcing phase embedded in matrix phase

 

Award [1 max] for implying “composites only have heterogeneous/nonhomogeneous compositions”.

[2 marks]

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