What is the hydroxyl ion (OH-) concentration of a solution of pH 8?

Question

Quizplus · Accepted Answer

The pH of a solution is defined as the negative logarithm (base 10) of the hydrogen ion (H+) concentration. pH = -log[H+]. By rearranging this equation, we can solve for [H+]: [H+] = 10^-pH. At pH 8, [H+] = 10^-8. Since water dissociates into equal amounts of H+ and OH- ions, we can use the expression Kw = [H+][OH-] to calculate the OH- concentration: [OH-] = Kw/[H+] = 10^-14/10^-8 = 10^-6 M. Therefore, the correct answer is D.

What Is the Hydroxyl Ion (OH-) Concentration of a Solution