Calculate the hydroxide ion concentration in an aqueous solution that contains 3.50 × 10^-5 M in hydronium ion. A)2.86 × 10^-2 M B)2.86 × 10^-9 M C)2.86 × 10^-10 M D)3.50 × 10^-10 M

Question

Quizplus · Accepted Answer

For any aqueous solution at 25°C, the concentration of the hydronium ion multiplied by the concentration of the hydroxide ion is always equal to 1. Thus, [H3O+][OH-] = 1. To find the concentration of the hydroxide ion, we can rearrange this equation to get [OH-] = 1/[H3O+]. Plugging in the given concentration of hydronium ion (3.50 × 10^-5 M), we get [OH-] = 2.86 × 10^-10 M. Therefore, the correct answer is choice C.

Calculate the Hydroxide Ion Concentration in an Aqueous Solution That