ine is a diprotic amino acid with a pk = 2.344 for the carboxylic group and a pK, = 9.868 for the ammonium group. At pH = 5.32, what is the second most abundant species in solution? (Hint: In its fully onated form, both the carboxylic acid and ammonium group are protonated) L

ine is a diprotic amino acid with a pk = 2.344 for the carboxylic group and a pK, = 9.868 for the ammonium group. At pH = 5.32, what is the second most abundant species in solution? (Hint: In its fully onated form, both the carboxylic acid and ammonium group are protonated) L

World of Chemistry, 3rd edition

3rd Edition

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Author:Steven S. Zumdahl, Susan L. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan L. Zumdahl, Donald J. DeCoste

Chapter21: Biochemistry

Section: Chapter Questions

Problem 10A

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Question

Alanine is a diprotic amino acid with a pka = 2.344 for the carboxylic group and a pka = 9.868 for the ammonium group. At pH = 5.32, what is the second most abundant species in solution? (Hint: In its fully
%3D
protonated form, both the carboxylic acid and ammonium group are protonated)
a. H2L*
b. H2L
с. HL+
d. HL
е. HL-
f. L
g. L-
O d
O e
O b
O f
O a
O g

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