Calculate the hydronium ion concentration in an aqueous solution that contains 2.50 × 10^-⁴ M in hydroxide ion. A) 4.00 × 10^-⁹ M B) 4.00 × 10^-¹⁰ M C) 4.00 × 10^-¹¹ M D) 5.00 × 10^-¹¹ M

Question

Quizplus · Accepted Answer

First, we need to use the fact that Kw = [H3O+][OH-] = 1.0 x 10^-14 at 25°C.

Since we are given the hydroxide ion concentration, we can solve for the hydronium ion concentration:

Kw = [H3O+][OH-]
1.0 x 10^-14 = [H3O+](2.50 x 10^-14)
[H3O+] = 4.00 x 10^-1 M

Therefore, the hydronium ion concentration is 4.00 x 10^-11 M.

The only choice that matches this value is C.

Calculate the Hydronium Ion Concentration in an Aqueous Solution That