A solution has a hydroxide ion concentration of 1 × 10^-11 M.What is the pH of the solution,and is it acidic or basic?

Question

Quizplus · Accepted Answer

The pH of the solution can be determined using the formula pH = -log[H+], where [H+] is the hydrogen ion concentration. In this case, we are given the hydroxide ion concentration, but can find [H+] by using the fact that in a neutral solution, [H+] = [OH-] = 1 × 10^-7 M.

To find [H+] in this solution, we can use the equation Kw = [H+][OH-] = 1 × 10^-14 M^2 (where Kw is the ion product constant for water). With [OH-] = 1 × 10^-11 M, solving for [H+] gives us:

[H+] = Kw/[OH-] = (1 × 10^-14 M^2)/(1 × 10^-11 M) = 1 × 10^-3 M

Taking the -log of this value gives us a pH of 3, which is acidic. Therefore, the correct answer is C, pH = 3, acidic.

A Solution Has a Hydroxide Ion Concentration of 1 ×