Hydrogen Ion Concentration Calculator
The Hydrogen Ion Concentration Calculator converts a pH value into the molar concentration of hydrogen ions [H+], and also shows the hydroxide concentration [OH-].
Formula
[H+] = 10^(-pH); [OH-] = 10^(-(14 - pH))
- pH is the negative logarithm (base 10) of the hydrogen ion concentration.
- At 25 °C, pH + pOH = 14.
pH 3
Inputs
- pH: 3
[H+] = 10^-3 = 1.00 × 10^-3 mol/L, an acidic solution.
Frequently asked questions
How do you convert pH to [H+]?
Take 10 to the power of negative pH. For pH 3, [H+] = 10^-3 = 0.001 mol/L.