Twenty-five milliliters of 0.10 M HCl(aq)is titrated with 0.10 M NaOH(aq).What is the pH before any NaOH(aq)is added?

Question

Quizplus · Accepted Answer

Before any NaOH is added, the solution contains only HCl. HCl is a strong acid and dissociates completely in water, so the concentration of H+ ions in the solution is equal to the initial concentration of HCl.

[H+] = 0.10 M

To find the pH, we use the formula:

pH = -log[H+]

pH = -log(0.10)

pH = 1.0

Twenty-Five Milliliters of 0