Chemistry Additional

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Machines can analyse unknown substances: Advantages:

  • Very sensitive
  • Very fast
  • Very accurate

Gas Chromotography used to identify substances:

The steps:

  • A gas used to carry substances through column packed with solid material.
  • Substances travel through tube at different speeds so they are separated.
  • The time it takes the detector…



What specification is this? I've got a chemistry additional exam in 5days and I'm doing the edexcel specification and haven't learnt anything like this

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