How this calculator works
pH = -log₁₀[H⁺].
Formula
pH=-log₁₀[H⁺]pH from positive hydrogen-ion concentration in mol/L.
Worked example
Verified example is a verified test case used by the calculation engine.
Assumptions and limitations
- Hydrogen-ion concentration must be positive.
- Concentration is interpreted in mol/L.
- This is the direct concentration definition, not an activity correction model.
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 concentration be positive?
The logarithm is undefined for zero or negative concentration.
Does this model activity coefficients?
No. It uses the supplied hydrogen-ion concentration directly.