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AP Chemistry
8.7 pH and pKa
8.5 Acid-Base Titrations
8.3 Weak Acid and Base Equilibria
AdvancedMCQGraphicalConceptual20.2k
Titration curve for \(25.0\text{ mL}\) of \(\text{HA(aq)}\) titrated with \(0.100\text{ M }\text{NaOH(aq)}\).
Titration curve for \(25.0\text{ mL}\) of \(\text{HA(aq)}\) titrated with \(0.100\text{ M }\text{NaOH(aq)}\).
A student titrates a \(25.0\text{ mL}\) sample of a weak monoprotic acid, \(\text{HA(aq)}\), with \(0.100\text{ M }\text{NaOH(aq)}\) at \(25\text{ }^\circ\text{C}\). The titration curve obtained from the experiment is shown below.

Based on the titration curve, which of the following gives the best estimate of the \(\text{p}K_a\) of \(\text{HA}\) and provides the correct explanation for why the \(\text{pH}\) at the equivalence point is greater than \(7.00\)?

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