Question: how can pka be determined from a titration curve?
Answer: Pick a point on your titration curve prior to the equivalence point and record its pH, which is the vertical coordinate of the curve. ... At the point when the example solution had a pH of 5.3, this was (1/4)/(3/4), or 1/3: 5.3 = pKa + log (1/3) = pKa + -. 48; so 5.3 + . 48 = pKa + -.