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title: "A buffer solution is prepared by mixing equal volumes of \\(0.20\\text{ M } \\text{HNO}_2\\text{(aq)}\\) and \\(0.20\\text{ M } \\text{KNO}_2\\text{(aq)}\\). A student adds several drops of \\(0.10\\text{ M } \\text{KOH(aq)}\\) to a portion of the buffer. Which of the following is the net ionic equation for the primary reaction that occurs upon addition of the \\(\\text{KOH(aq)}\\)?"
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url: "https://nerd-notes.com/ubq/123766/"
date_modified: "2026-09-28T12:30:12+00:00"
---

# A buffer solution is prepared by mixing equal volumes of \(0.20\text{ M } \text{HNO}_2\text{(aq)}\) and \(0.20\text{ M } \text{KNO}_2\text{(aq)}\). A student adds several drops of \(0.10\text{ M } \text{KOH(aq)}\) to a portion of the buffer. Which of the following is the net ionic equation for the primary reaction that occurs upon addition of the \(\text{KOH(aq)}\)?

A buffer solution is prepared by mixing equal volumes of \(0.20\text{ M } \text{HNO}_2\text{(aq)}\) and \(0.20\text{ M } \text{KNO}_2\text{(aq)}\). A student adds several drops of \(0.10\text{ M } \text{KOH(aq)}\) to a portion of the buffer. Which of the following is the net ionic equation for the primary reaction that occurs upon addition of the \(\text{KOH(aq)}\)?

- **A.** \(\text{H}^+\text{(aq)} + \text{OH}^-\text{(aq)} \rightarrow \text{H}_2\text{O(l)}\)
- **B.** \(\text{HNO}_2\text{(aq)} + \text{KOH(aq)} \rightarrow \text{KNO}_2\text{(aq)} + \text{H}_2\text{O(l)}\)
- **C.** \(\text{HNO}_2\text{(aq)} + \text{OH}^-\text{(aq)} \rightarrow \text{NO}_2^-\text{(aq)} + \text{H}_2\text{O(l)}\)
- **D.** \(\text{NO}_2^-\text{(aq)} + \text{H}_2\text{O(l)} \rightleftharpoons \text{HNO}_2\text{(aq)} + \text{OH}^-\text{(aq)}\)

*The answer key and step-by-step explanation are available to logged-in users at https://nerd-notes.com/ubq/123766/*