C$.$ Determination of $p{K}_a$ of Unknown Acid

First determination

Second determination mLNaOH,$pH$

Third determination mLNaOH,$pH$

Volume at equivalence point Volume at one$-$half equivalence point

$p{K}_c$

$p{K}_c$

$K_a$

$p{K}_a$

$K_a$

$K_a$

Standard deviation of $K_a$

Average $K_a($show calculations$)$