Chemical AnalysisMedium Exam FrequencyAQA

Chromatography

Revise Chromatography in Chemical Analysis for GCSE Chemistry with 20 exam-style questions and 15 flashcards. This topic appears regularly enough that it should be part of a solid GCSE revision cycle.

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The Science Behind Solving Crimes

Introduction 2

What is Chromatography?

Deep Dive 3

Paper Chromatography Method

Deep Dive 4

How and Why Substances Separate

How It Works 5

Key Definitions

Definitions 6

Rf Value Calculations

Worked Example 7

Interpreting Chromatogram Results

Comparison 8

Common Misconceptions

Misconceptions 9

Memory Aid

Memory Aid 10

Higher Tier: Other Types of Chromatography

Higher Tier 11

Exam Focus

Exam Focus 12

Exam Tips for Chromatography

Exam Tips 13

Topic Summary: 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)

Sample Questions

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

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