Make a comparison of the strength of MnO4 as an oxidizing agent in acidic and basic solution nE° (V) 6 4 2 0 -2 -4 Mn 0 Frost diagram for manganese Mn²+ Mn(OH)2 1 2 MnO₂ Mn3+ H3MnO4 Mn₂O3 MnO₂ 3 4 Oxidation number HMnO4 MnO4³- 5 MnO4²- 6 7 MnO4- pH = 0 pH = 14 MnO4-

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**Comparison of MnO₄⁻ as an Oxidizing Agent in Acidic and Basic Solutions**

**Description:**

The Frost diagram for manganese presents a graphical comparison of the standard reduction potentials (nE°) of various manganese species across different oxidation states, ranging from 0 to +7. It is essential to understand how these species behave as oxidizing agents in both acidic (pH = 0) and basic (pH = 14) conditions.

**Graph Explanation:**

- **Axes:**
  - The x-axis represents the oxidation number of manganese, from 0 to +7.
  - The y-axis represents the standard reduction potential (nE°) in volts.

- **Lines:**
  - The blue line corresponds to acidic conditions (pH = 0).
  - The red line corresponds to basic conditions (pH = 14).

**Key Points on the Frost Diagram:**

1. **Oxidation Number 0:** 
   - Manganese (Mn) starts at nE° = 0 for both conditions.

2. **Acidic Conditions (pH = 0):**
   - The blue line shows that Mn⁷⁺ in MnO₄⁻ is a strong oxidizing agent, with a high nE° value compared to other species.
   - As the oxidation state decreases, the reduction potential initially lowers and then rises again, indicating varying oxidizing strengths of the species.

3. **Basic Conditions (pH = 14):**
   - The red line indicates that MnO₄⁻ still acts as an oxidizing agent, but with a lower nE° value compared to acidic conditions.
   - The curve presents a gradual increase from Mn(OH)₂ through higher oxidation states, showing weaker oxidizing power than in acidic conditions.

**Conclusion:**

The Frost diagram visually demonstrates the enhanced oxidizing power of MnO₄⁻ in acidic environments compared to basic ones. This difference affects the reduction potential and reactivity, valuable for understanding manganese chemistry's environmental and practical implications.
Transcribed Image Text:**Comparison of MnO₄⁻ as an Oxidizing Agent in Acidic and Basic Solutions** **Description:** The Frost diagram for manganese presents a graphical comparison of the standard reduction potentials (nE°) of various manganese species across different oxidation states, ranging from 0 to +7. It is essential to understand how these species behave as oxidizing agents in both acidic (pH = 0) and basic (pH = 14) conditions. **Graph Explanation:** - **Axes:** - The x-axis represents the oxidation number of manganese, from 0 to +7. - The y-axis represents the standard reduction potential (nE°) in volts. - **Lines:** - The blue line corresponds to acidic conditions (pH = 0). - The red line corresponds to basic conditions (pH = 14). **Key Points on the Frost Diagram:** 1. **Oxidation Number 0:** - Manganese (Mn) starts at nE° = 0 for both conditions. 2. **Acidic Conditions (pH = 0):** - The blue line shows that Mn⁷⁺ in MnO₄⁻ is a strong oxidizing agent, with a high nE° value compared to other species. - As the oxidation state decreases, the reduction potential initially lowers and then rises again, indicating varying oxidizing strengths of the species. 3. **Basic Conditions (pH = 14):** - The red line indicates that MnO₄⁻ still acts as an oxidizing agent, but with a lower nE° value compared to acidic conditions. - The curve presents a gradual increase from Mn(OH)₂ through higher oxidation states, showing weaker oxidizing power than in acidic conditions. **Conclusion:** The Frost diagram visually demonstrates the enhanced oxidizing power of MnO₄⁻ in acidic environments compared to basic ones. This difference affects the reduction potential and reactivity, valuable for understanding manganese chemistry's environmental and practical implications.
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