A triprotic weak acid H3A has pkai = 2.50, pKa2 = 6.70 and pKa3 = 10.30.Calculate the pH of a solution of 0.10 M N22HA.%3Da.b.Determine the principal species at pH = 5.00 and calculate its alphafraction.2)

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2) A triprotic weak acid H3A has pKa1 = 2.50, pKa2 = 6.70 and pKa3 = 10.30. Calculate the pH of a solution of 0.10 M N2>HA. а. b. Determine the principal species at pH = 5.00 and calculate its alpha fraction.

2) A triprotic weak acid H3A has pKa1 = 2.50, pKa2 = 6.70 and pKa3 = 10.30. Calculate the pH of a solution of 0.10 M N2>HA. а. b. Determine the principal species at pH = 5.00 and calculate its alpha fraction.

Chemistry & Chemical Reactivity

10th Edition

ISBN:9781337399074

Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Chapter21: The Chemistry Of The Main Group Elements

Section: Chapter Questions

Problem 128SCQ

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Concept explainers

Acid Base Titration

An acid-base titration is the method of quantitative analysis for determining the concentration of an acid and base by exactly neutralizing it with a standard solution of base or acid having known concentration.

Question

A triprotic weak acid H3A has pkai = 2.50, pKa2 = 6.70 and pKa3 = 10.30.
Calculate the pH of a solution of 0.10 M N22HA.
%3D
a.
b.
Determine the principal species at pH = 5.00 and calculate its alpha
fraction.
2)

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