The following partial data were collected while titrating 25.0 mL of a monoprotic…
CHEMISTRY · Single correct · A Level · Chemistry · Acids and bases · Acids and bases
Problem
The following partial data were collected while titrating 25.0 mL of a monoprotic weak acid of unknown concentration with 0.100 M KOH at 25 °C.
Volume KOH added (mL): 0.00 | 12.50 | 25.00
Measured pH: 3.10 | 4.78 | 8.65
What is the approximate pKa of the acid?
(a) 8.65
(b) 5.08
(c) 4.78
(d) 3.10