Nernst Equation Calculator

Nernst Equation

The Nernst Equation is used to calculate the reduction potential of a cell reaction. The formula is as follows:

\[ E = E^0 - \frac{RT}{zF} \ln(Q) \]

Where:

• \(E\) is the reduction potential (V)
• \(E^0\) is the standard potential (V)
• \(R\) is the gas constant (8.314 J/(mol·K))
• \(T\) is the temperature (K)
• \(z\) is the ion charge
• \(F\) is the Faraday constant (96485 C/mol)
• \(Q\) is the reaction quotient

Nernst Equation Definition

The Nernst Equation relates the electrical potential difference across a membrane (or cell) to the concentration gradient of ions across that membrane. It helps in understanding ion movement, which is essential for biological processes like nerve impulses, muscle contraction, and the functioning of electrochemical cells.

Example Calculation

To calculate the reduction potential, follow these steps:

1. Determine the standard potential: \(E^0 = 1.23 \, \text{V}\)
2. Measure the temperature: \(T = 298 \, \text{K}\)
3. Calculate the ion charge: \(z = 2\)
4. Determine the reaction quotient: \(Q = 0.1\)
5. Calculate the reduction potential using the Nernst Equation.

FAQs

What is cell potential? Cell potential is the measure of the electric potential difference between two half-cells in an electrochemical reaction.