finding pH at equivalence

[echoyjeff222]

Is it ok to use the pKa(conjugate acid) + pH (titrant acid) / 2 that was presented for indicators to use as a general way to calculate pH at equivalence for titrations? Will it get me close enough to the answer (instead of using the other shortcut equation TBR presents)

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[BerkReviewTeach]

Is it ok to use the pKa(conjugate acid) + pH (titrant acid) / 2 that was presented for indicators to use as a general way to calculate pH at equivalence for titrations? Will it get me close enough to the answer (instead of using the other shortcut equation TBR presents)

Yes! It's a great trick that saves time. It's like using pKa1 and pKa2 to find an isoelectric point (which is an equivalence point where the net charge is zero).