Electrode potential depends upon

Options

A. Size of electrode
B. Surface area of electrode
C. Temperature
D. Shape of electrode

Answer

### Step-by-Step Solution:

1. **Understanding Electrode Potential**:
- Electrode potential is the measure of the tendency of a chemical species to acquire electrons and thereby be reduced. It is represented by the symbol \( E \).

2. **Nernst Equation**:
- The Nernst equation describes the relationship between the electrode potential and the concentration of the reactants and products involved in the electrochemical reaction. The equation is given by:
\[ E = E^0 - \frac{0.059}{n} \log Q \]
- Here, \( E^0 \) is the standard electrode potential, \( n \) is the number of moles of electrons transferred in the reaction, and \( Q \) is the reaction quotient.

3. **Factors Affecting Electrode Potential**:
- **Concentration**: The concentration of the reactants and products affects the value of \( Q \), which in turn affects the electrode potential.
- **Temperature**: The temperature influences the electrode potential as it appears in the Nernst equation. Generally, as temperature increases, the electrode potential decreases.
- **Nature of the Electrode**: Different materials have different intrinsic properties which can affect the electrode potential.
- **pH of the Solution**: The pH can affect the concentration of hydrogen ions in solution, which can influence the electrode potential in reactions involving protons.

4. **Intensive Property**:
- Electrode potential is classified as an intensive property, meaning it does not depend on the amount of material present (size, mass, surface area, shape).

5. **Conclusion**:
- In summary, the electrode potential depends primarily on temperature, concentration of reactants/products, the nature of the electrode material, and the pH of the solution.