We negate both sides. So this becomes negative, this becomes positive. Then we raise both of these to the power of ten so that the law cancels out. And we get that the concentration of the hydrogen ion in solution is equal to one times ten to negative ten when our PH is equal to 7.0. Now, by knowing what the hydrogen ion concentration is, we can also determine what the hydroxide concentration in solution is. And that's because of the following equation.