Calculate the pH of a solution with a hydroxide... - SS2 Chemistry Acids, Bases, and pH Question

To calculate the pH of a solution based on the hydroxide ion concentration, we can use the pOH formula:

pOH = -log[OH-]

Since pH + pOH = 14 (at 25°C), we can subtract the pOH value from 14 to obtain the pH:

pH = 14 - pOH

Given that the hydroxide ion concentration ([OH-]) is 1 x 10^-11 M, we can calculate the pOH:

pOH = -log(1 x 10^-11) = 11

Substituting the pOH value into the pH formula:

pH = 14 - 11 = 3

Therefore, the pH of the solution is 3.