Solution pH
Solution pH
pH measures acidity on a logarithmic scale, compressing a huge range of hydrogen-ion concentrations into 0–14.
The pH is pH = −log₁₀(c_H). where c_H is the hydrogen-ion concentration in mol/L.
Inputs
c_H := 0.001=1e-03
Take the negative base-10 logarithm.
pH := -log10(c_H)=3
Results
Each pH unit is a tenfold change in acidity. A pH of 3 here is acidic; 7 is neutral and above 7 is alkaline.
Assumptions & limitations
- Dilute aqueous solution.
- Concentration in mol/L.
- Activity ≈ concentration.