What is the hydronium ion concentration and the pH for an aqueous solution of NH₃ that has a hydroxide ion concentration of 2.25 × 10^-3 M?

Question

Quizplus · Accepted Answer

First, we use the Kw expression:
Kw = [H+][OH-] = 1.0 × 10^-14
Since the given solution has [OH-] = 2.25 × 10^-3 M, we can solve for [H+]:
[H+][2.25 × 10^-3] = 1.0 × 10^-14
[H+] = 4.44 × 10^-12 M

Using the definition of pH:
pH = -log[H+]
pH = -log[4.44 × 10^-12]
pH = 11.35

Therefore, the correct answer is D: 4.44 × 10^-12 M, 11.35.

What Is the Hydronium Ion Concentration and the PH for an Aqueous