---
title: "A mixture of \\(\\text{SO}_2\\text{(g)}\\), \\(\\text{O}_2\\text{(g)}\\), and \\(\\text{SO}_3\\text{(g)}\\) is held at equilibrium in a rigid \\(2.0\\text{ L}\\) container at a constant temperature according to the following equation.  \\[ 2\\,\\text{SO}_2\\text{(g)} + \\text{O}_2\\text{(g)} \\rightleftharpoons 2\\,\\text{SO}_3\\text{(g)} \\]  At equilibrium, the concentration of each gas is \\([\\text{SO}_2] = 0.40\\text{ M}\\), \\([\\text{O}_2] = 0.10\\text{ M}\\), and \\([\\text{SO}_3] = 0.20\\text{ M}\\). Based on this information, what is the value of the equilibrium constant, \\(K_c\\), for the reaction at this temperature?"
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url: "https://nerd-notes.com/ubq/119876/"
date_modified: "2026-08-21T08:16:49+00:00"
---

# A mixture of \(\text{SO}_2\text{(g)}\), \(\text{O}_2\text{(g)}\), and \(\text{SO}_3\text{(g)}\) is held at equilibrium in a rigid \(2.0\text{ L}\) container at a constant temperature according to the following equation.

\[ 2\,\text{SO}_2\text{(g)} + \text{O}_2\text{(g)} \rightleftharpoons 2\,\text{SO}_3\text{(g)} \]

At equilibrium, the concentration of each gas is \([\text{SO}_2] = 0.40\text{ M}\), \([\text{O}_2] = 0.10\text{ M}\), and \([\text{SO}_3] = 0.20\text{ M}\). Based on this information, what is the value of the equilibrium constant, \(K_c\), for the reaction at this temperature?

A mixture of \(\text{SO}_2\text{(g)}\), \(\text{O}_2\text{(g)}\), and \(\text{SO}_3\text{(g)}\) is held at equilibrium in a rigid \(2.0\text{ L}\) container at a constant temperature according to the following equation.

\[ 2\,\text{SO}_2\text{(g)} + \text{O}_2\text{(g)} \rightleftharpoons 2\,\text{SO}_3\text{(g)} \]

At equilibrium, the concentration of each gas is \([\text{SO}_2] = 0.40\text{ M}\), \([\text{O}_2] = 0.10\text{ M}\), and \([\text{SO}_3] = 0.20\text{ M}\). Based on this information, what is the value of the equilibrium constant, \(K_c\), for the reaction at this temperature?

- **A.** \(2.5\)
- **B.** \(5.0\)
- **C.** \(13\)
- **D.** \(25\)

*The answer key and step-by-step explanation are available to logged-in users at https://nerd-notes.com/ubq/119876/*