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

Name: Twenty-five milliliters of 0.10 M HCl is titrated with 0.10 M NaOH. What is the pH before any NaOH is added?
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Question

Quizplus · Accepted Answer

The initial pH of the HCl solution can be calculated from the concentration of H+ ions in solution:
[H+] = 0.10 M HCl × (1 mol H+/1 mol HCl) = 0.10 M
pH = -log[H+] = -log(0.10) = 1.0

Twenty-Five Milliliters of 0