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Topic: acid/base question  (Read 2736 times)

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Offline rfaraday

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acid/base question
« on: September 11, 2007, 10:35:37 PM »
a 10 mM solution of a weak monocarboxlylic acid has a pH of 3.00. Calculate Ka and pKa for this carboxylic acid.

I am not sure what equations i need, perhaps the Henderson-Hasselbalch?
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Offline AWK

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Re: acid/base question
« Reply #1 on: September 12, 2007, 01:05:31 AM »
Quote from: rfaraday on September 11, 2007, 10:35:37 PM
a 10 mM solution of a weak monocarboxlylic acid has a pH of 3.00. Calculate Ka and pKa for this carboxylic acid.

I am not sure what equations i need, perhaps the Henderson-Hasselbalch?
Just write eqution for Ka and do some approximation [H+]=[A-] and [HA}=c
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AWK
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