Testing for metal ions with sodium hydroxide solution

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  • Created by: nilani
  • Created on: 25-02-13 20:26
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  • Add NaOH sol
    • White precipitate
      • Add More NaOH sol
        • Precipitate dissolves
          • Al 3+
        • Precipitate insoluble
          • Ca 2+ or Mg +
    • No precipitate
      • Warm sol & test for ammonia
        • NH3 smells; litmus turns blue
          • NH4 +
    • Coloured precipitate
      • Green (slowly turning brown)
        • Fe 2+
      • Light blue?
        • Cu 2+
      • Reddish brown?
        • Fe 3+

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