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Microscale chemistry: testing for unsaturation with bromine

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Use reverse disproportionation to produce a source of bromine – which you can later use to test for unsaturated hydrocarbons

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Testing for unsaturation using bromine - teacher
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Testing for unsaturation using bromine - student
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Scotland
- Higher
  - SQA Chemistry
    - 2. Nature's chemistry
      - (d) Esters, fats and oils
        Unsaturated compounds quickly decolourise bromine solution.
- National 5
  - SQA Chemistry
    - Nature's chemistry
      - Homologous series
        Alkenes
        Chemical equations can be written for the addition reactions of alkenes, using molecular or structural formulae.
        with halogens forming dihaloalkanes
Wales
- GCSE
  - WJEC Combined science
    - Unit 5: Chemistry 2
      - 5.5 CRUDE OIL, FUELS AND CARBON COMPOUNDS
        (n) the addition reactions of alkenes with hydrogen and bromine and the use of bromine water in testing for alkenes
  - WJEC Chemistry
    - Unit 2: CHEMICAL BONDING, APPLICATION OF CHEMICAL REACTIONS and ORGANIC CHEMISTRY
      - 2.5 CRUDE OIL, FUELS AND ORGANIC CHEMISTRY
        (o) the addition reactions of alkenes with hydrogen and bromine and the use of bromine water in testing for alkenes
- A/AS level
  - WJEC Chemistry
    - Unit 2: ENERGY, RATE AND CHEMISTRY OF CARBON COMPOUNDS
      - 2.5 Hydrocarbons
        (h) bromine/bromine water and potassium manganate(VII) tests for alkenes
England
- GCSE
- A/AS level

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