Tests for Anions and Cations
- Created by: SamDavies
- Created on: 06-02-14 17:01
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- UNKNOWN CHEMICAL
- Ammonia gas test
- Damp red litmus paper turns blue
- Flame test
- Bright red
- Golden yellow
- Lilac
- Brick red
- Blue-green
- Add Sodium Hydroxide solution (NaOH)
- Warm slightly
- Ammonia is given off
- Ammonium ions (NH4+) present
- Ammonia gas test
- Damp red litmus paper turns blue
- Smell
- Ammonia is given off
- Coloured precipitate
- Light blue
- Reddish-brown
- Sludgy green
- Warm slightly
- Halide test (G7 elements)
- Add dilute nitric acid (HNO3) and silver nitrate (AgNO3)
- White precipitate
- Cream precipitate
- Pale yellow precipitate
- Add dilute nitric acid (HNO3) and silver nitrate (AgNO3)
- Carbonates test
- Add dilute HCL acid
- Sulfate test
- Ammonia gas test
- Iodide (I-)
- Pale yellow precipitate
- I- + Ag ==> AgI
- White precipitate
- Add Barium Chloride (BaCl)
- Barium Sulphate
- White precipitate
- Add Barium Chloride (BaCl)
- Ba2 + + SO4 2- ==> BaSO4
- White precipitate
- Copper (II) (Cu2+)
- Light blue
- Iron (II) (Fe2+)
- Sludgy green
- Iron (III) (Fe3+)
- Reddish-brown
- Lithium (Li+)
- Sodium (Na+)
- Potassium (K+)
- Calcium (Ca+)
- Copper (Cu+)
- Red
- Blue
- Carbonates test
- Add dilute HCL acid
- Key
- CATIONS
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