AP Chemistry
8.5 Acid-Base Titrations
8.4 Acid-Base Reactions and Buffers
8.3 Weak Acid and Base Equilibria
A student titrates a \(25.0 \text{ mL}\) sample of \(0.100 \text{ M } \text{HC}_2\text{H}_3\text{O}_2\text{(aq)}\) (\(K_a = 1.8 \times 10^{-5}\)) with \(0.100 \text{ M } \text{NaOH(aq)}\) at \(25^\circ\text{C}\). The titration reaction is represented by the following equation:
\[ \text{HC}_2\text{H}_3\text{O}_2\text{(aq)} + \text{OH}^-\text{(aq)} \rightarrow \text{C}_2\text{H}_3\text{O}_2^-\text{(aq)} + \text{H}_2\text{O(l)} \]
Which of the following best predicts and justifies the \(\text{pH}\) of the solution at the equivalence point of the titration?
\[ \text{HC}_2\text{H}_3\text{O}_2\text{(aq)} + \text{OH}^-\text{(aq)} \rightarrow \text{C}_2\text{H}_3\text{O}_2^-\text{(aq)} + \text{H}_2\text{O(l)} \]
Which of the following best predicts and justifies the \(\text{pH}\) of the solution at the equivalence point of the titration?
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