It is defined as the negative logarithm (base 10) of the $\mathrm{H}^{+}$ concentration.
So, if the $\mathrm{pH}$ is 6, we can use the formula $\mathrm{pH} = -\log[\mathrm{H}^{+}]$ to find the $\mathrm{H}^{+}$ concentration.
Rearranging the formula, we have
Show more…