Nernst Equation Calculator
Calculate cell potential using the Nernst equation with standard potential, temperature, electrons, and reaction quotient. Free online calculator with charts.
About This Calculator
The Nernst Equation Calculator computes cell potential E using E = E deg - (RT/nF) · ln(Q). Enter standard potential, temperature, electrons, and reaction quotient for instant results.
Developed by Walther Nernst in 1887, this equation corrects standard cell potential for concentration effects, predicting battery voltage under real operating conditions.
Frequently Asked Questions
What is the Nernst equation?
The Nernst equation (E = E deg - (RT/nF)ln Q) calculates cell potential under non-standard conditions.
What is the reaction quotient Q?
Q has the same form as equilibrium constant K but uses current concentrations.
How does temperature affect cell potential?
Temperature affects the RT/nF term, increasing sensitivity to concentration changes.
What is standard cell potential?
E deg is measured at 1 M, 1 atm, and 298 K from reduction potentials.
When is the Nernst equation used?
Used for batteries, fuel cells, corrosion, and biological membrane potentials.