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posted by  turtle head on 4/18/2008 9:40:34 AM  |  status: Live  

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Question Details:
what is the pH of a 0.30M pyridine solution that has a Kb= 1.9 x 10 -9.
      C5H5N + H2O <> C5H5NH +OH

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posted by larios on 4/18/2008 6:15:04 PM  |  status: Live
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Response Details:
 C5H5N + H2O <> C5H5NH +OH
Kb= [C5H5NH][OH]=    X2
              [C5H5N]       0.30-X
1.9e-9=  X2/ 0.30
X= 2.39e-5 pOH= -log(2.39e-5) = 4.62
 
pH= 14-4.62= 9.38
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