What this topic covers
Topic 8: Chemical analysis has 3 subtopics:
- Purity, formulations and chromatography
- Identification of common gases
- Identification of ions by chemical and spectroscopic means (chemistry only)
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GCSE AQA Foundation Chemistry · Topic 8 of 11
Topic 8: Chemical analysis – GCSE AQA Foundation Chemistry revision notes
Choose a subtopic. Topic 8: Chemical analysis covers Purity, formulations and chromatography, Identification of common gases, and Identification of ions by chemical and spectroscopic means (chemistry only) in GCSE AQA Foundation Chemistry. 17 lessons in 3 subtopics.
Revise Topic 8: Chemical analysis for GCSE AQA Foundation Chemistry, including Purity, formulations and chromatography and Identification of common gases.
17
Lessons
3
Subtopics
Topic 8: Chemical analysis lessons by subtopic
17 lessons, grouped by subtopic.
Purity, formulations and chromatography
- Paper Chromatography - Principles and Applications
- Chromatogram Analysis and Rf Values
- Understanding Formulations
- What is a Pure Substance?
- Using Melting and Boiling Points to Test Purity
Identification of common gases
- Testing for Oxygen Gas
- Testing for hydrogen gas
- Testing for Carbon Dioxide Gas
- Testing for Chlorine Gas
Identification of ions by chemical and spectroscopic means (chemistry only)
- Testing for Halide Ions with Silver Nitrate
- Testing for Metal Ions with Sodium Hydroxide
- Coloured Precipitates and Chemical Equations
- Testing for Carbonates with Acids
- Testing for Sulfate Ions
- Flame Tests for Metal Ion Identification
- Introduction to Flame Emission Spectroscopy
- Interpreting Flame Emission Spectroscopy Results
More in this course
Go back to the full GCSE AQA Foundation Chemistry topic list, or practise this topic with past-paper questions.
Frequently asked questions
What is Topic 8: Chemical analysis?
Topic 8: Chemical analysis covers Purity, formulations and chromatography, Identification of common gases, and Identification of ions by chemical and spectroscopic means (chemistry only) in GCSE AQA Foundation Chemistry. 17 lessons in 3 subtopics.
What is a chromatogram?
A chromatogram is the pattern of separated substances produced by chromatography, showing spots at different distances from the origin. The Chromatogram Analysis and Rf Values notes cover this in full.
What is the test for hydrogen?
The test for hydrogen is to hold a burning splint at the mouth of the test tube: if hydrogen is present, it burns rapidly with a pop sound. The Testing for hydrogen gas notes cover this in full.
How do you test for sulfate ions?
To test for sulfate ions, add a few drops of dilute hydrochloric acid to the solution, then add barium chloride solution. The Testing for Sulfate Ions notes cover this in full.
How do you calculate an Rf value?
Rf = distance moved by substance ÷ distance moved by solvent, both measured from the origin. The Chromatogram Analysis and Rf Values notes cover this in full.
What is the test for oxygen?
The test for oxygen is to put a glowing splint into a test tube of the gas: if oxygen is present, the splint relights. The Testing for Oxygen Gas notes cover this in full.
What is the test for carbon dioxide?
The test for carbon dioxide is to bubble the gas through limewater, or shake it with limewater: carbon dioxide turns limewater milky (cloudy). The Testing for Carbon Dioxide Gas notes cover this in full.
What are the flame test colours?
The flame test colours are lithium crimson, sodium yellow, potassium lilac, calcium orange-red and copper green. The Flame Tests for Metal Ion Identification notes cover this in full.
What is a formulation?
A formulation is a mixture that has been designed as a useful product, where each component has a specific purpose and is present in carefully measured quantities. The Understanding Formulations notes cover this in full.