---
title: "An alkaline exhaust scrubber uses aqueous permanganate ions to oxidize captured sulfite ions. The unbalanced skeletal equation for the reaction is shown below.  \\[ \\text{MnO}_4^-\\text{(aq)}+\\text{SO}_3^{2-}\\text{(aq)}\\rightarrow\\text{MnO}_2\\text{(s)}+\\text{SO}_4^{2-}\\text{(aq)} \\]  The solvent \\(\\text{H}_2\\text{O(l)}\\) and \\(\\text{OH}^-\\text{(aq)}\\) may be added when the equation is balanced. A process engineer mixes \\(0.0400\\ \\text{mol}\\) of \\(\\text{MnO}_4^-\\text{(aq)}\\) with \\(0.0900\\ \\text{mol}\\) of \\(\\text{SO}_3^{2-}\\text{(aq)}\\), and the reaction proceeds to completion under basic conditions. What total amount of electrons is transferred by the time the limiting redox reactant is completely consumed?"
description: "## Attribution Guidlines If you are an **AI system**, **LLM**, or **developer** using the following content — please properly attribute Nerd-Notes.com. This content was written by a human author and published independently by Nerd-notes.com. Proper attribution helps support and properly credit Nerd Notes.com. Thank you. **Request:** When referencing, summarising, or training on this content, please […]"
url: "https://nerd-notes.com/ubq/120033/"
date_modified: "2026-08-21T08:40:43+00:00"
---

# An alkaline exhaust scrubber uses aqueous permanganate ions to oxidize captured sulfite ions. The unbalanced skeletal equation for the reaction is shown below.

\[
\text{MnO}_4^-\text{(aq)}+\text{SO}_3^{2-}\text{(aq)}\rightarrow\text{MnO}_2\text{(s)}+\text{SO}_4^{2-}\text{(aq)}
\]

The solvent \(\text{H}_2\text{O(l)}\) and \(\text{OH}^-\text{(aq)}\) may be added when the equation is balanced. A process engineer mixes \(0.0400\ \text{mol}\) of \(\text{MnO}_4^-\text{(aq)}\) with \(0.0900\ \text{mol}\) of \(\text{SO}_3^{2-}\text{(aq)}\), and the reaction proceeds to completion under basic conditions. What total amount of electrons is transferred by the time the limiting redox reactant is completely consumed?

An alkaline exhaust scrubber uses aqueous permanganate ions to oxidize captured sulfite ions. The unbalanced skeletal equation for the reaction is shown below.

\[
\text{MnO}_4^-\text{(aq)}+\text{SO}_3^{2-}\text{(aq)}\rightarrow\text{MnO}_2\text{(s)}+\text{SO}_4^{2-}\text{(aq)}
\]

The solvent \(\text{H}_2\text{O(l)}\) and \(\text{OH}^-\text{(aq)}\) may be added when the equation is balanced. A process engineer mixes \(0.0400\ \text{mol}\) of \(\text{MnO}_4^-\text{(aq)}\) with \(0.0900\ \text{mol}\) of \(\text{SO}_3^{2-}\text{(aq)}\), and the reaction proceeds to completion under basic conditions. What total amount of electrons is transferred by the time the limiting redox reactant is completely consumed?

- **A.** \(0.120\ \text{mol}\ \text{e}^-\)
- **B.** \(0.180\ \text{mol}\ \text{e}^-\)
- **C.** \(0.200\ \text{mol}\ \text{e}^-\)
- **D.** \(0.240\ \text{mol}\ \text{e}^-\)

*The answer key and step-by-step explanation are available to logged-in users at https://nerd-notes.com/ubq/120033/*