Which substance is the reducing agent in this reaction? 2Cr(OH)3 +3OCI¯ + 40H¯→2CrO4-2+3Cl + 5H2O

Chemistry
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ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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Chapter1: Chemical Foundations
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## Understanding Redox Reactions: Identifying the Reducing Agent

### Problem Statement

**Which substance is the reducing agent in this reaction?**

\[ 2\text{Cr(OH)}_3 + 3\text{Cl}^- + 4\text{OH}^- \rightarrow 2\text{CrO}_4^{2-} + 3\text{Cl}^- + 5\text{H}_2\text{O} \]

**Express your answer as a chemical formula.**

### Explanation

In this redox reaction, you need to determine which substance acts as the reducing agent. A reducing agent is the species that donates electrons and gets oxidized in the process.

### Steps to Solve:

1. **Identify changes in oxidation states:**
   - Chromium in Cr(OH)₃ is oxidized to CrO₄²⁻, indicating that Cr undergoes oxidation.
   - Chlorine (Cl⁻) does not change its oxidation state in this reaction.

2. **Determine the reducing agent:**
   - Since chromium is being oxidized from Cr(OH)₃ to CrO₄²⁻, it acts as the reducing agent in this reaction.

### Answer

The reducing agent is **Cr(OH)₃**.

### Additional Tips

If you're unsure, use the available hints or review the concept of what constitutes a reducing agent. Remember, the reducing agent is oxidized while reducing another species.
Transcribed Image Text:## Understanding Redox Reactions: Identifying the Reducing Agent ### Problem Statement **Which substance is the reducing agent in this reaction?** \[ 2\text{Cr(OH)}_3 + 3\text{Cl}^- + 4\text{OH}^- \rightarrow 2\text{CrO}_4^{2-} + 3\text{Cl}^- + 5\text{H}_2\text{O} \] **Express your answer as a chemical formula.** ### Explanation In this redox reaction, you need to determine which substance acts as the reducing agent. A reducing agent is the species that donates electrons and gets oxidized in the process. ### Steps to Solve: 1. **Identify changes in oxidation states:** - Chromium in Cr(OH)₃ is oxidized to CrO₄²⁻, indicating that Cr undergoes oxidation. - Chlorine (Cl⁻) does not change its oxidation state in this reaction. 2. **Determine the reducing agent:** - Since chromium is being oxidized from Cr(OH)₃ to CrO₄²⁻, it acts as the reducing agent in this reaction. ### Answer The reducing agent is **Cr(OH)₃**. ### Additional Tips If you're unsure, use the available hints or review the concept of what constitutes a reducing agent. Remember, the reducing agent is oxidized while reducing another species.
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