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# Finding the pH of a Buffer

APCHEM-4UOFX9

The $K_a$ of $HA$ is $1.0 \times 10^{-4}$.

What is the pH of a buffer that is 0.08 M $NaA$ and 0.1 M $HA$?

A

2.16

B

3.91

C

4.00

D

4.10