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Understanding the weak base NH3 in water - please help.

  1. Feb 21, 2014 #1
    Hi i have a general question concerning the behavior of a weak base NH3 in water.
    If we have a reaction between a weak base and water

    NH3 + H2O = NH4(+) + OH(-)

    NH3 is a weak base with respect to the base ,OH(-), produced from water. This means that the lone pair of OH(-) will Attack a high procentage of the NH4+ that NH3 want’s to produce from water.

    Is it correctly assumed that the weak base NH3 is actually competing against 2 bases in a water solution: It’s competing against OH because OH reacts with NH4+ but it also competes aginst water, because the following equilibrium must be true
    NH4+ + H2O = H3O(+) + NH3
    So actually NH4+ reacts with OH and H2O to form NH3…Correct?

    A last question:
    Is OH(-) a more reactive base than water? For instance if we have put a weak acid into water, would the OH(-) produced from waters autoinoization reaction prefer to attack the weak acid more than water itself?
  2. jcsd
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