# How does pH relate to H^+?

Apr 22, 2015

pH is the $- \log \left[{H}^{+}\right]$ where $\left[{H}^{+}\right]$ is the concentration of protons (positively charged hydrogen).

If the pH is 2 and there is no $O {H}^{-}$ whatsoever in solution for some odd reason, then $\left[{H}^{+}\right] = {10}^{-} 2$ M $= 0.1 M$.