Analysing substances
- Created by: Kat0402
- Created on: 21-03-18 14:44
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- analysing substances
- Halide ions
- Ions formed by halogens (group7)
- Add silver nitrate solution
- Add nitric acid to remove impurities
- Chlorine-white precipitate
- Bromine-cream precipitate
- Iodine-yellow precipitate
- Ions
- Add Sodium Hydroxide
- Fe2+ muddy green
- Fe3+ Rusty brown
- Ca2+ white
- Al2+ white but in excess dissapears
- Mg2+ white
- Cu2+ blue
- Flame tests
- Ca2+ Orange-Red
- Li+ Crimson
- Na+ Yellow
- Cu2+ Green
- K+ Lilac
- Gas tests
- Oxygen
- Relights a glowing splint
- Hydrogen
- Lit splint makes a 'squeaky pop'
- Chlorine
- Bleaches damp litmus paper white
- Carbon dioxide
- Lime water turns 'milky'
- Oxygen
- Sulfate ions
- add small amount of HCl
- add barium chloride solution
- white precipitate of BaSO4 formed
- Carbonate ions
- Add dilute HCl
- bubble gas through limewater
- effervescence (as CO2 is produced)
- limewater turns cloudy
- Halide ions
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