Question

What is the pH of a solution that has a hydrogen ion concentration of 1.0×10−8 M ?Express your answer using two significant figures.

Answer 1

Answer: pH = 8.0

Explanation:

The question requires us to calculate the pH of a solution which contains a hydrogen ion concentration of 1.0×10−8 M.

The pH of a solution can be calculated from the hydrogen ion concentration ([H+]) according to the following equation:

$pH=-\log _{10}\lbrack H^+\rbrack$

Thus, applying the hydrogen ion concentration provided by the question:

$pH=-\log _{10}(1.0\times10^{-8})=8.0$

Therefore, the pH of the solution is 8.0.