What is the pH of a solution where the hydrogen ion concentration is 1 x 10^8 moles per liter?

To determine the pH of a solution, you use the formula pH = -log[H⁺], where [H⁺] represents the concentration of hydrogen ions in moles per liter. In this case, the hydrogen ion concentration is given as 1 x 10^8 moles per liter.

Calculating the pH involves taking the negative logarithm of the hydrogen ion concentration:

pH = -log(1 x 10^8)

= -(-8) (since log(1 x 10^8) simplifies to 8)

= 8

This value indicates that the solution is basic since a pH greater than 7 indicates a basic solution. Thus, the correct answer is 8. This means that the answer aligns with the pH scale, where a pH of 7 is neutral, values lower than 7 are acidic, and values higher than 7 are basic.