Testing for metal ions with sodium hydroxide solution
- 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 +
- Precipitate dissolves
- Add More NaOH sol
- No precipitate
- Warm sol & test for ammonia
- NH3 smells; litmus turns blue
- NH4 +
- NH3 smells; litmus turns blue
- Warm sol & test for ammonia
- Coloured precipitate
- Green (slowly turning brown)
- Fe 2+
- Light blue?
- Cu 2+
- Reddish brown?
- Fe 3+
- Green (slowly turning brown)
- White precipitate
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