1. What is Cathodic Potential?

Definition: Cathodic Potential is defined as electrode potential where the metal ions will be pulled towards the electrode.

Purpose: This calculator helps determine the cathodic potential based on anodic potential and moles of electrons involved in the reaction.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( Epc \) — Cathodic Potential (V)
• \( Epa \) — Anodic Potential (V)
• \( me \) — Moles of Electron (mol)

Explanation: The cathodic potential is calculated by subtracting the ratio of 57 to moles of electrons from the anodic potential.

3. Importance of Cathodic Potential

Details: Understanding cathodic potential is crucial in electrochemistry, corrosion studies, and designing cathodic protection systems.

4. Using the Calculator

Tips: Enter the anodic potential in volts and moles of electrons (must be > 0). The calculator will determine the cathodic potential.

5. Frequently Asked Questions (FAQ)

Q1: What is the significance of the 57 in the formula?
A: The value 57 comes from (2.303 × RT)/F at 25°C, where R is the gas constant, T is temperature, and F is Faraday's constant.

Q2: What are typical values for anodic potential?
A: Anodic potential varies by material and conditions, but common values range from -0.5V to +2.0V for many metals.

Q3: How do I determine moles of electrons?
A: Moles of electrons can be determined from the balanced redox reaction or using Faraday's laws of electrolysis.

Q4: What units are used in this calculation?
A: Both potentials are in volts (V) and moles of electrons are in moles (mol).

Q5: Can this calculator be used for non-standard conditions?
A: The formula assumes standard conditions (25°C). For other temperatures, the 57 value would need adjustment.