For the electrochemical cell Al(s) + 3 Mn²+ (aq) → 2 Al³+ (aq) + 3 Mn(s) (E° = 0.48 V, [A1³*] = 1.0 M), what is the value of E when [Mn²+] = 0.078 M? Assume T is 298 K

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Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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Chapter1: Chemical Foundations
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**Electrochemical Cell Calculation**

**Question 9 of 9**

**Scenario:**

For the electrochemical cell:
\[ 2 \text{Al(s)} + 3 \text{Mn}^{2+}\text{(aq)} \rightarrow 2 \text{Al}^{3+}\text{(aq)} + 3 \text{Mn(s)} \]
- Standard Cell Potential (\(E^\circ\)) = 0.48 V
- Concentration of \([\text{Al}^{3+}]\) = 1.0 M

**Problem:**

Determine the value of the cell potential (\(E\)) when the concentration of \([\text{Mn}^{2+}]\) is 0.078 M. Assume the temperature (\(T\)) is 298 K.

---

**Notes:**

- Inputs such as the standard cell potential and concentrations are vital for calculating the actual cell potential using the Nernst equation.
- The Nernst equation will account for non-standard conditions, incorporating temperature and ion concentrations to provide the cell potential (\(E\)) under specified conditions.

**Interactive Element:**

- A numeric keypad interface is provided to input answers, with buttons for numbers, decimal points, positive/negative signs, and exponential notation (x10).
Transcribed Image Text:**Electrochemical Cell Calculation** **Question 9 of 9** **Scenario:** For the electrochemical cell: \[ 2 \text{Al(s)} + 3 \text{Mn}^{2+}\text{(aq)} \rightarrow 2 \text{Al}^{3+}\text{(aq)} + 3 \text{Mn(s)} \] - Standard Cell Potential (\(E^\circ\)) = 0.48 V - Concentration of \([\text{Al}^{3+}]\) = 1.0 M **Problem:** Determine the value of the cell potential (\(E\)) when the concentration of \([\text{Mn}^{2+}]\) is 0.078 M. Assume the temperature (\(T\)) is 298 K. --- **Notes:** - Inputs such as the standard cell potential and concentrations are vital for calculating the actual cell potential using the Nernst equation. - The Nernst equation will account for non-standard conditions, incorporating temperature and ion concentrations to provide the cell potential (\(E\)) under specified conditions. **Interactive Element:** - A numeric keypad interface is provided to input answers, with buttons for numbers, decimal points, positive/negative signs, and exponential notation (x10).
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