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Topic: pKa --> pH  (Read 36058 times)

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Offline science2000

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pKa --> pH
« on: March 13, 2006, 01:08:36 AM »
Does anyone know of a conversion formula for pKa to pH?
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Offline barcrphd

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Re:pKa --> pH
« Reply #1 on: March 13, 2006, 02:39:51 AM »
i think the relation is available in any chemistry books.

we can workout pKa=pKw - pKb where pKb is the strength of the conjugate base.

now pKw = pH + pOH

substituting

pKa = pH + pOH - PKb

i think it is clear.
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Offline Borek

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Re:pKa --> pH
« Reply #2 on: March 13, 2006, 03:42:44 AM »
Quote from: science2000 on March 13, 2006, 01:08:36 AM
Does anyone know of a conversion formula for pKa to pH?

There is no one simple formula allowing pH calculation for every case.

Take a look at pH cheat sheet and pH calculation lectures
« Last Edit: March 13, 2006, 06:44:45 PM by Borek »
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