Analysing substances

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  • 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'
    • 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

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