What is the pH of a solution that has a hydronium ion concentration of #1.00*10^-10# M?
The pH of an aqueous solution can be found simply by taking the negative logarithm of your hydronium ion concentration, or stated mathematically,
So, if we plug in your numbers we'll get:
Throw that bad boy in your calculator and you'll find your pH. Or I can just tell you. (It's 10.)