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Acetic acid (from vinegar) is stronger, though mono-basic. pKa = 4.77

Carbonic acid (H2CO3) is di-basic. pKa,1 = 6.36 and pKa,2 = 10.25

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Acetic acid (from vinegar) is stronger, though mono-basic. pKa = 4.77

Carbonic acid (H2CO3) is di-basic. pKa,1 = 6.36 and pKa,2 = 10.25

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pKa=40

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how do you calculate pKa

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pKa=2.86

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pKa= pH - log(A/HA)

to clarify -log is subtract log

E.g A buffer is prepared by adding .15 M of NaOH and .1 of a weak acid, HA. If the pH of the buffer is 8.15, what is the pKa of the acid?

pH= 8.15 - log .15/.1

= 7.97

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