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Topic: Expected pH of a buffer solution...  (Read 3423 times)

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Offline calaren

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Expected pH of a buffer solution...
« on: February 06, 2011, 05:40:37 PM »
Blargh...I have the following problem on my homework:

What is the expected pH of a weak acid buffer solution prepared in such a way that the [HCOOH] is 0.135M (pKa = 3.75) and the [HCOONa] is 0.480M?

I looked up buffers in my textbook - it only gives one example and that's not helping me any... :(

I don't know where to start!  Ye Gods, I'm so lost...
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Offline Borek

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Re: Expected pH of a buffer solution...
« Reply #1 on: February 06, 2011, 05:43:28 PM »
Simple plug and chug into Henderson-Hasselbalch equation.
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Offline calaren

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Re: Expected pH of a buffer solution...
« Reply #2 on: February 06, 2011, 05:49:04 PM »
Well, duh... *facepalm*
Why do I try to make things so much more complicated than they really are?  ???
Thank you so much!  :D
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"Chemistry has been termed by the physicist as the messy part of physics, but that is no reason why the physicists should be permitted to make a mess of chemistry when they invade it."
Frederick Soddy
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