---
title: "A student prepares three separate \\(0.10 \\text{ M}\\) aqueous solutions of sodium salts containing the conjugate bases of three unknown monoprotic weak acids: \\(\\text{HX}\\), \\(\\text{HY}\\), and \\(\\text{HZ}\\). The student measures the \\(\\text{pH}\\) of each solution at \\(25^\\circ\\text{C}\\) and records the data in the table below.  | Solution | Solute concentration (M) | Measured pH | | :— | :— | :— | | \\(\\text{NaX(aq)}\\) | \\(0.10\\) | \\(8.20\\) | | \\(\\text{NaY(aq)}\\) | \\(0.10\\) | \\(9.60\\) | | \\(\\text{NaZ(aq)}\\) | \\(0.10\\) | \\(8.90\\) |  Based on the data, which of the following correctly ranks the parent weak acids in order of decreasing acid strength?"
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url: "https://nerd-notes.com/ubq/123773/"
date_modified: "2026-09-28T12:30:15+00:00"
---

# A student prepares three separate \(0.10 \text{ M}\) aqueous solutions of sodium salts containing the conjugate bases of three unknown monoprotic weak acids: \(\text{HX}\), \(\text{HY}\), and \(\text{HZ}\). The student measures the \(\text{pH}\) of each solution at \(25^\circ\text{C}\) and records the data in the table below.

| Solution | Solute concentration (M) | Measured pH |
| :— | :— | :— |
| \(\text{NaX(aq)}\) | \(0.10\) | \(8.20\) |
| \(\text{NaY(aq)}\) | \(0.10\) | \(9.60\) |
| \(\text{NaZ(aq)}\) | \(0.10\) | \(8.90\) |

Based on the data, which of the following correctly ranks the parent weak acids in order of decreasing acid strength?

A student prepares three separate \(0.10 \text{ M}\) aqueous solutions of sodium salts containing the conjugate bases of three unknown monoprotic weak acids: \(\text{HX}\), \(\text{HY}\), and \(\text{HZ}\). The student measures the \(\text{pH}\) of each solution at \(25^\circ\text{C}\) and records the data in the table below.

| Solution | Solute concentration (M) | Measured pH |
| :--- | :--- | :--- |
| \(\text{NaX(aq)}\) | \(0.10\) | \(8.20\) |
| \(\text{NaY(aq)}\) | \(0.10\) | \(9.60\) |
| \(\text{NaZ(aq)}\) | \(0.10\) | \(8.90\) |

Based on the data, which of the following correctly ranks the parent weak acids in order of decreasing acid strength?

- **A.** \(\text{HX} > \text{HZ} > \text{HY}\)
- **B.** \(\text{HX} > \text{HY} > \text{HZ}\)
- **C.** \(\text{HY} > \text{HZ} > \text{HX}\)
- **D.** \(\text{HY} > \text{HX} > \text{HZ}\)

*The answer key and step-by-step explanation are available to logged-in users at https://nerd-notes.com/ubq/123773/*