Tests for Cations

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  • Created by: Abbie
  • Created on: 20-05-12 12:49

Testing for Cations

Cations are positive ions, such as Na+ or Ca2+

Flame tests identify metal ions:

  • Lithium, Li+, burns with a red flame
  • Sodium, Na+ burns with a yellow-orange flame
  • Potasium, K+, burns with a lilac flame
  • Calcium, Ca2+, burns with a brick-red flame
  • Barium, Ba2+, burns with a green flame

Some metals form a coloured precipitate with NaOH:

- Many metal…

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