Chemical testings for negative molecular ions

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  • Created by: Katy **
  • Created on: 23-04-14 16:45
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  • Molecular ions
    • Sulfate ions
      • (SO4)2-
      • substance a solid
        • dissolve in water
          • solution
      • reagant
        • Barium chloride solution
        • Hydrochloric acid
      • Ba2+(aq) + (SO4)2-(aq) ? BaSO4(s)
        • ionic equation
      • barium sulfate
        • BaSO4
        • white ppt
    • Chloride ions
      • (CO3)2-
      • either solid or solution
      • reagant
        • Hydrochloric acid
      • observation
        • bubbles
        • fizz
        • gas given off turns limewater milky
          • carbon dioxide
      • Calcium carbonate + Hydrochloric acid ? Calcium chloride + Water + Carbon doxide
        • CaCO3 + 2HCl ? CaCl2 + H2O + CO2
    • Ammonium ions
      • (NH4)-
      • either solid or solution
      • reagant
        • Sodium hydroxide solution
        • HEAT
      • observation
        • gas given off turns damp litmus paper blue
          • ammonia
            • NH3
          • red ? blue

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