During a titration, the pH of an analyte solution containing HA(aq) is 5.56 and the ratio of (A /[HA] is 0.842. What is the K, of HA? Assume the solution is in its buffering region, where pH of the solution can be approximated by: pH = pK, + log(IA V/IHA])

During a titration, the pH of an analyte solution containing HA(aq) is 5.56 and the ratio of (A /[HA] is 0.842. What is the K, of HA? Assume the solution is in its buffering region, where pH of the solution can be approximated by: pH = pK, + log(IA V/IHA])

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

Chapter18: Principles Of Chemical Reactivity: Entropy And Free Energy

Section: Chapter Questions

Problem 44PS

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Question

During a titration, the pH of an analyte solution containing HA(aq) is 5.56 and the ratio of (A /[HA]
is 0.842. What is the K, of HA? Assume the solution is in its buffering region, where pH of the
solution can be approximated by:
pH = pK, + log(IA V[HA])
O 2.3 x 10-8
O 1.5 x 10-5
4.7 x 104
2.3 x 10-6
3.9 x 10-9

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