The general formula for finding pH is:
[tex]pH=-log[ H _{3}O ^{+}] [/tex] -> This equation could also work with H+.
So using the formula and plugging in the hydronium ion concentration:
[tex]pH=-log(2* 10^{-14}M) [/tex]
[tex]pH=13.7[/tex]
So the solution has a pH of 13.7.