Separation of mixtures

2 marks · Normal

Give two reasons why chromatography is useful for separating the components of ink.

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Also accept: Different dyes travel different distances; Can separate and identify different dyes

Common mistakes: confusing with filtration

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Marking points

B1 · 1 mark · States that chromatography separates the different dyes (or components)

B2 · 1 mark · States can be used to identify the dyes, or that different dyes move at different rates/distances

Worked solution

Chromatography is useful because (1) it can separate the different dyes found in ink, and (2) it can help identify the dyes based on how far they travel on the paper.