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Learning objective

Analyze simple chromatograms to determine: (a) unknown substances by comparing them with known substances (b) whether substances are pure or impure.

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  • Read the explanation.
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  • Practise with linked questions.
Cambridge IGCSE Combined ScienceExperimental techniques and chemical analysisCore content

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Quick explanation

Analyze simple chromatograms to determine: (a) unknown substances by comparing them with known substances (b) whether substances are pure or impure

  • This point belongs to Chromatography, especially Chromatography outcomes.
  • You need to be able to analyze simple chromatograms to determine: (a) unknown substances by comparing them with known substances (b) whether substances are pure or impure.
  • The key ideas to know are Identify, Compare, and Evaluate.
  • Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Key concepts

IdentifyCompareEvaluate

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This objective helps connect Chromatography outcomes to exam-style questions, flashcards, and revision notes for Chromatography.

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Paper 3 structured question: Chromatography

Paper 3Theory (Core)2 marks

Description

Chromatogram Analysis

The chromatogram shows three spots labeled A, B, and C. Spot A is higher than spots B and C.

  1. a

    Analyse Discuss what the presence of three spots indicates about the mixture.

    Aim for approximately 2 distinct marking points.

    [2]
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