How this calculator works
E = E° - (RT/nF) ln Q.
Formula
E=E°-(RT/nF)lnQCell potential from the Nernst equation with SI constants.
Worked example
Verified example is a verified test case used by the calculation engine.
Assumptions and limitations
- Temperature, electron count and reaction quotient must be positive.
- R and F use SI constants.
- Inputs describe the chosen reaction convention.
Methodology & sources
This calculator uses deterministic, versioned calculation logic. The formula and verified examples above are part of the calculation definition used by CalcuMint. Technical calculation version: 1.
- CalcuMint deterministic chemistry engine
Frequently asked questions
Why must Q be positive?
The natural logarithm requires a positive reaction quotient.
What happens when Q equals 1?
ln(1)=0, so E equals the standard potential.