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Chemical AnalysisVery High Exam FrequencyAQA

Chromatography

Revise Chromatography in Chemical Analysis for GCSE Chemistry with 23 exam-style questions and 15 flashcards. This is a very high-frequency exam topic, so it is worth revising until the core ideas feel automatic.

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1

The Science Behind Solving Crimes

Introduction2

What is Chromatography?

Deep Dive3

Paper Chromatography Method

Deep Dive4

How and Why Substances Separate

How It Works5

Key Definitions

Definitions6

Rf Value Calculations

Worked Example7

Interpreting Chromatogram Results

Comparison8

Common Misconceptions

Misconceptions9

Memory Aid

Memory Aid10

Higher Tier: Other Types of Chromatography

Higher Tier11

Exam Focus

Exam Focus12

Exam Tips for Chromatography

Exam Tips13

Knowledge Organiser: Chromatography

Summary

Sample Flashcards

What is chromatography?
A separation technique used to separate mixtures into their individual components based on different affinities for mobile and stationary phases
What does Rf stand for and what does it measure?
Rf = Retention factor. It measures how far a substance travels compared to the solvent (distance moved by substance ÷ distance moved by solvent)

Exam questions for Chromatography

What is the purpose of chromatography?

  • A. To separate the components of a mixture
  • B. To measure the mass of a substance
  • C. To change a substance from a solid to a liquid
  • D. To make a substance more concentrated
1 markfoundation

Explain how a chromatogram can be used to determine whether a substance is pure or a mixture.

3 marksstandard

Want more? See all GCSE Chemistry exam questions by paper with full model answers and mark schemes.

23

exam-style questions

15

revision flashcards

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