Analysing Substances
- Created by: Uswa
- Created on: 24-03-13 15:38
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- Analysing Substances
- Flame tests can be used to identify metal ions
- Lithium compounds
- Crimson flame
- Sodium compounds
- Yellow flame
- Potassium compounds
- Lilac flame
- Calcium compounds
- Red flame
- Barium compounds
- Green flame
- Lithium compounds
- Al, Ca and Mg ions
- White precipitate with Sodium Hydroxide solution
- But only aluminium hydroxide precipitate dissolves in excess sodium hydroxide solution
- White precipitate with Sodium Hydroxide solution
- Copper and Iron form a coloured precipitate with Sodium Hydroxide solution
- Copper--> Blue
- Fe (ll)--> Green
- Fe (lll)--> Brown
- Carbonates react with dilute acids
- Produces carbon dioxide
- Forms a white prec. with limewater, which turns it cloudy
- Produces carbon dioxide
- Sulfate ions in solution form a white prec. with barium chloride solution
- In the presence of dilute HCl acid
- Flame tests can be used to identify metal ions
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