How to use this calculator
- Select the solve mode or desired unknown.
- Enter the known values with their units.
- Calculate, then review the normalized values and steps.
Formula and variables
E = E0 - RT ln(Q)/(nF)
| Symbol | Meaning | Unit |
|---|---|---|
| E | cell potential | V |
| E0 | standard potential | V |
| Q | reaction quotient | dimensionless |
| n | electron count | mol e- |
Worked example
At 298.15 K with E0=1.10 V, n=2, and Q=10, the Nernst correction lowers the cell potential.
Interpretation
The reaction quotient and balanced electron count determine the nonstandard-condition correction.
Common mistakes
- Q must be positive before taking its logarithm.
- Electron count is a positive integer from the balanced redox reaction.
Frequently asked questions
How are invalid inputs handled?
The calculator validates every required value before it calls the deterministic engine.
Can I reproduce the result?
The result panel lists the engine and data versions used for the calculation.