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title: "A student prepares a buffer solution by combining \\(100.0\\text{ mL}\\) of \\(0.50\\text{ M }\\text{CH}_3\\text{COOH(aq)}\\) and \\(100.0\\text{ mL}\\) of \\(0.10\\text{ M }\\text{CH}_3\\text{COONa(aq)}\\). To this solution, the student adds \\(0.010\\text{ mol}\\) of solid \\(\\text{NaOH}\\), stirring until it dissolves completely with negligible change in total volume. Given that the \\(\\text{p}K_a\\) of \\(\\text{CH}_3\\text{COOH}\\) is \\(4.74\\) and \\(\\log_{10}(2) \\approx 0.30\\), which of the following is the \\(\\text{pH}\\) of the resulting buffer solution?"
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url: "https://nerd-notes.com/ubq/119825/"
date_modified: "2026-08-21T08:12:31+00:00"
---

# A student prepares a buffer solution by combining \(100.0\text{ mL}\) of \(0.50\text{ M }\text{CH}_3\text{COOH(aq)}\) and \(100.0\text{ mL}\) of \(0.10\text{ M }\text{CH}_3\text{COONa(aq)}\). To this solution, the student adds \(0.010\text{ mol}\) of solid \(\text{NaOH}\), stirring until it dissolves completely with negligible change in total volume. Given that the \(\text{p}K_a\) of \(\text{CH}_3\text{COOH}\) is \(4.74\) and \(\log_{10}(2) \approx 0.30\), which of the following is the \(\text{pH}\) of the resulting buffer solution?

A student prepares a buffer solution by combining \(100.0\text{ mL}\) of \(0.50\text{ M }\text{CH}_3\text{COOH(aq)}\) and \(100.0\text{ mL}\) of \(0.10\text{ M }\text{CH}_3\text{COONa(aq)}\). To this solution, the student adds \(0.010\text{ mol}\) of solid \(\text{NaOH}\), stirring until it dissolves completely with negligible change in total volume. Given that the \(\text{p}K_a\) of \(\text{CH}_3\text{COOH}\) is \(4.74\) and \(\log_{10}(2) \approx 0.30\), which of the following is the \(\text{pH}\) of the resulting buffer solution?

- **A.** \(4.44\)
- **B.** \(4.74\)
- **C.** \(5.04\)
- **D.** \(5.34\)

*The answer key and step-by-step explanation are available to logged-in users at https://nerd-notes.com/ubq/119825/*