When we say that
[Acid]=[Conjugate Base]
pH=pKa,
why is it pKa and not pKb since it's the conjugate base? Emphasis on base. And vice versa, when [Base]=[Conjugate Acid], pOH=pKb.
Optimum Buffer Capacity
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Chem_Mod
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Re: Optimum Buffer Capacity
Take a look at the H-H equation, and set the ratio [A]/[HA] equal to 1. This is the same thing as saying HA=A or acid=conjugate base. Then, all that's left is pH = pKa.
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