Calculate the hydroxide ion concentration in an aqueous solution that contains 3.50 × 10^-3 M in hydronium ion. A)2.86 × 10^-4 M B)2.86 × 10^-11 M C)2.86 × 10^-12 M D)3.50 × 10^-12 M

Question

Quizplus · Accepted Answer

The concentration of hydroxide ions can be found using the equation:
Kw = [H3O+][OH-]
where Kw is the ion-product constant of water (1.0 × 10^-14 at 25°C).
Given [H3O+] = 3.50 × 10^-3 M,
Therefore, [OH-] = Kw /[H3O+] = (1.0 × 10^-14)/(3.50 × 10^-3) = 2.86 × 10^-12 M
Hence the correct option is C.

Calculate the Hydroxide Ion Concentration in an Aqueous Solution That