In the potentiometric titration of phosphoric acid, pH readings at the first and second half-equivalence points were pH1 = 2.12 and pH2 = 7.21 respectively. Determine the Ka1 and Ka2 for phosphoric acid, rounded to 3 sig figs. At the half-equivalence points, pH = pKa. Also, pH = –log [H+] and pKa = –log Ka.
In the potentiometric titration of phosphoric acid, pH readings at the first and second half-equivalence points were pH1 = 2.12 and pH2 = 7.21 respectively. Determine the Ka1 and Ka2 for phosphoric acid, rounded to 3 sig figs. At the half-equivalence points, pH = pKa. Also, pH = –log [H+] and pKa = –log Ka.
Chemistry: Principles and Reactions
8th Edition
ISBN:9781305079373
Author:William L. Masterton, Cecile N. Hurley
Publisher:William L. Masterton, Cecile N. Hurley
Chapter14: Equilibria In Acid-base Solutions
Section: Chapter Questions
Problem 74QAP: Fifty cm3 of 1.000 M nitrous acid is titrated with 0.850 M NaOH. What is the pH of the solution (a)...
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In the potentiometric titration of phosphoric acid, pH readings at the first and second half-equivalence points were pH1 = 2.12 and pH2 = 7.21 respectively. Determine the Ka1 and Ka2 for phosphoric acid, rounded to 3 sig figs.
At the half-equivalence points, pH = pKa. Also, pH = –log [H+] and pKa = –log Ka.
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