---
title: "A student measures the \\(\\text{pH}\\) of a sample of nitric acid, \\(\\text{HNO}_3\\text{(aq)}\\), to be \\(2.30\\) at \\(25\\,^\\circ\\text{C}\\), which corresponds to \\([\\text{H}_3\\text{O}^+] = 5.0 \\times 10^{-3}\\text{ M}\\). What is the concentration of \\(\\text{OH}^-\\text{(aq)}\\) in this solution?"
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url: "https://nerd-notes.com/ubq/119860/"
date_modified: "2026-08-21T08:16:29+00:00"
---

# A student measures the \(\text{pH}\) of a sample of nitric acid, \(\text{HNO}_3\text{(aq)}\), to be \(2.30\) at \(25\,^\circ\text{C}\), which corresponds to \([\text{H}_3\text{O}^+] = 5.0 \times 10^{-3}\text{ M}\). What is the concentration of \(\text{OH}^-\text{(aq)}\) in this solution?

A student measures the \(\text{pH}\) of a sample of nitric acid, \(\text{HNO}_3\text{(aq)}\), to be \(2.30\) at \(25\,^\circ\text{C}\), which corresponds to \([\text{H}_3\text{O}^+] = 5.0 \times 10^{-3}\text{ M}\). What is the concentration of \(\text{OH}^-\text{(aq)}\) in this solution?

- **A.** \(5.0 \times 10^{-13}\text{ M}\)
- **B.** \(2.0 \times 10^{-12}\text{ M}\)
- **C.** \(1.0 \times 10^{-11}\text{ M}\)
- **D.** \(5.0 \times 10^{-3}\text{ M}\)

*The answer key and step-by-step explanation are available to logged-in users at https://nerd-notes.com/ubq/119860/*