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Homework Help: Ph and weakbase

  1. Apr 23, 2007 #1
    The Ph of 0.3mol/l of a weak base is 10.66, calculate kb.

    I was thinking of using ph and calculate the concentration of H ions and then calculate poh and OH, but don't know what to do next. Any ideas?
  2. jcsd
  3. Apr 24, 2007 #2


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    This is much like a solution of a weak acid, but now the opposite. Model the work like some of the others in this board and you'll get the answer.

    OH- instead of H+;
    pOH instead of pH and convert back when ready.
    Kb instead of Ka.

    Look at some of the guidance which Borek and I have given and make appropriate changes.
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