Chemistry C3 Identifying Negative Ions
- Created by: Dominic Hayward
- Created on: 12-05-13 14:53
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- Identifying negative Ions
- Carbonates
- Add Hydrochloric Acid
- Carbonates will fizz
- To prove -Add potential carbonate
- Bubble into limewater
- Will go cloudy if a carbonate
- Bubble into limewater
- To prove -Add potential carbonate
- Carbonates will fizz
- Add Hydrochloric Acid
- Sulfates
- Dissolve potential sulfate in distilled water
- Acidify with Hydrochloric acid
- Add Barium Chloride
- If there is a white precipitate, then it is a sulfate.
- Add Barium Chloride
- Acidify with Hydrochloric acid
- Dissolve potential sulfate in distilled water
- Nitrates
- Add sodium hydroxide to potential nitrate
- Heat
- If there is no ammonia-add aluminium
- Aluminium reduces the nitrates
- React again with sodium hydroxide
- Ammonia should be given off
- Damp red litmus paper will turn blue
- Ammonia should be given off
- React again with sodium hydroxide
- (to test for ammonia- damp red litmus paper will turn blue)
- Aluminium reduces the nitrates
- If there is no ammonia-add aluminium
- Heat
- Add sodium hydroxide to potential nitrate
- Halides
- Dissolve potential halide in distilled water
- Add dilute HNO3
- Add silver nitrate
- Check precipitate
- Bromide-Cream
- Chloride-White
- Yellow-Iodide
- Check precipitate
- Add silver nitrate
- Add dilute HNO3
- Dissolve potential halide in distilled water
- Carbonates
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