Part 2 of 3
What can the pattern tell you?
Explain
Try it yourself
Explain: give reasons and connect them to evidence.
U gives blue and yellow spots on the lesson paper. A matches its blue spot; B matches its yellow spot. State what those matches support. Explain why solvent, paper and temperature must match too.
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Scope and sources
Cambridge IGCSE Chemistry 0620 · 2026–2028 v2 · Original learning materials.
0620 Extended12.3.1–4: suitable solvent, coloured and colourless paper chromatography, known/unknown comparison, purity evidence and Rf. Bounded12.4.2 method choice. Illustrative data; no real practical or chemical identity certification.
Apparatus, amounts and times in the experiment are illustrative. Real practical work follows a teacher-approved safety method.
Official Cambridge syllabus