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More Reactions in _Aqueous_ Solutions

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					More Reactions in (Aqueous)
        Solutions
 Reactions that produce gases:
• Carbonic acid
          H2CO3 (aq) → H2O (l) + CO2 (g)
• Sulfurous Acid
          H2SO3 (aq) → H2O (l) + SO2 (g)
• H2S (gas) – prodcued when sulfide (S2-) reacts
  with an acid.
• H2 (gas) –produced when a metal hydride reacts
  with water
• NH3(gas) – produced when NH4+(salt) reacts
  with a base
      Reactions that form weak
             electrolytes
• Know weak             • Strong acids (produce
  electrolytes (H2O,      weak electrolytes)
  NH4OH) – these will   • Examples: HCl, HBr,
  conduct very little     HI, HNO3, HClO3,
  electricity             HClO4
         Acid-Base Reactions
           (Neutralization)
• Will have a net ionic equation of
                 H+ + OH-  H2O(l)
• Must involve an acid (containing H+) and a
  base (usually containing OH-)

    NaOH(aq) + H2SO4(aq)  Na2SO4(aq) + H2O (l)
             Reactions with Metals
• Use activity series:
• The higher the metal in the
  series, the more reactive it is
  i.e., its reaction is fast and
  more exothermic.
• This also implies that the
  reverse reaction becomes
  more difficult i.e., the more
  reactive a metal, the more
  difficult it is to extract from its
  ore. The metal is also more
  susceptible to corrosion with
  oxygen and water.

				
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posted:4/6/2010
language:English
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