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Topic: preparing a buffer  (Read 9593 times)

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myelver10

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preparing a buffer
« on: November 23, 2004, 02:29:07 AM »
how would u  pick a suitable acid/base pair  to prepare a buffer with a pH of 3.5    

In this case the pKa is 3.5  right   ??
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Offline AWK

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Re:preparing a buffer
« Reply #1 on: November 23, 2004, 09:10:32 AM »
For weak acid with pKa = 3.5 your buffer solution should contain salt and weak acid with molar ratio 1:1. Of course you can use other acids, but with pKa within +-1 around pH of solution.
Formic acid with pKa 3.7 is probably the best choose.
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AWK
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