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I/GCSE Chemistry - Alkenes

Reaction with Halogens and Hydrogen

· IGCSE,Chemistry,igcse chemistry,alkenes,hydrigen

In the I/GCSE chemistry curriculum:

  • Alkenes are a homologous series of unsaturated hydrocarbons containing at least one Carbon-Carbon double bond in the structure.
  • General Formula: CnH2n
  • The first member of the series is Ethene
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Reaction with Halogens

Reaction Conditions: Room Temperature and pressure

 

In I/GCSE chemistry, it is always used for testing a C=C (Alkene) – Turns Bromine water from Orange to Colourless

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Reaction with Hydrogen

Conditions in the I/GCSE chemistry curriculum:

  • 180°C
  • Catalyst: finely divided Nickel
  • Used in the production of margarine. The long chain fatty acid residues in cooking oils are unsaturated, saturation converts oil into a solid, which can be used as margarine.
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