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Topic: *delete me* buffer solution problem!  (Read 3320 times)

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Offline mimi

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*delete me* buffer solution problem!
« on: March 11, 2009, 01:56:19 AM »
This problem has been driving me crazy:

What volumes of 0.59 M HNO2 and 0.60 M NaNO2 must be mixed to prepare 1.00 L of a solution buffered at pH = 3.64?

I know you have to use the henderson hasselbalch equation, but i can't get the pka!

Thanks
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Offline Borek

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Re: *delete me* buffer solution problem!
« Reply #1 on: March 11, 2009, 04:32:59 AM »
Is it not in your book? Some back pages, cover?

Is it not in books in your school library? CRC Handbok or something? Ask librarian if in doubt.

Is it not in wikipedia?
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ChemBuddy chemical calculators - stoichiometry, pH, concentration, buffer preparation, titrations.info

Offline Arkcon

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Re: *delete me* buffer solution problem!
« Reply #2 on: March 11, 2009, 08:33:31 AM »
Sorry, like Borek: says, you will need to look up the constant.  Funny, didn't this forum used to have a link on a sidebar on the first page to just such a table?
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Hey, I'm not judging.  I just like to shoot straight.  I'm a man of science.

Offline Borek

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Re: *delete me* buffer solution problem!
« Reply #3 on: March 11, 2009, 08:58:04 AM »
Yep, we had such links. Unfortunately, they didn't survive latest server move. And with Mitch finishing his PhD I doubt he has time for such details  ;D
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