Oxygen

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  • Created by: HLeiper
  • Created on: 31-03-14 09:33
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  • Oxygen
    • Atomosphere
      • Nitrogen 78%
      • CO2 0.04%
      • Oxygen 21%
      • Argon nearly 1%
    • Making Oxygen
      • Hydrogen Peroxide decomposes into water and oxygen
        • 2H2O2 --> 2H20 + 02
        • Manganese (IV) Oxide is the catalyst
          • Collect the oxygen over water by: Bubbling the gas into an upside down measuring cylinder filled with water or Using a gas syringe
    • Reactions with Air
      • Magnesium
        • Bright white flame and white powder (Magnesium Oxide) - slightly alkaline
        • 2Mg + O2--> 2MgO
      • Carbon
        • Very strongly heated, orange/yellow flame, produces carbon dioxide - slightly acidic
        • C + O --> CO2
      • Sulphur
        • Pale blue flame, produces sulphur dioxide - acidic
        • S + O --> SO2

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