A solution of 0.101 M cysteine is titrated with 0.0253 M HNO3. The pK₁ values for cysteine are 1.70, 8.36, and 10.74, orresponding to the carboxylic acid group, thiol group, and mino group, respectively. Calculate the pH at the quivalence point of the titration. H= + NH₂ HC—CH,—SH FO Cysteine

Chemistry: Principles and Reactions
8th Edition
ISBN:9781305079373
Author:William L. Masterton, Cecile N. Hurley
Publisher:William L. Masterton, Cecile N. Hurley
Chapter22: Organic Chemistry
Section: Chapter Questions
Problem 26QAP: When aniline, C6H5NH2(Kb=7.41010) , reacts with a strong acid, its conjugate acid, C6H5NH3+, is...
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A solution of 0.101 M cysteine is titrated with 0.0253 M
HNO3. The pKa values for cysteine are 1.70, 8.36, and 10.74,
corresponding to the carboxylic acid group, thiol group, and
amino group, respectively. Calculate the pH at the
equivalence point of the titration.
pH =
+
NH3
HC—CH2—SH
C=O
Cysteine
Transcribed Image Text:A solution of 0.101 M cysteine is titrated with 0.0253 M HNO3. The pKa values for cysteine are 1.70, 8.36, and 10.74, corresponding to the carboxylic acid group, thiol group, and amino group, respectively. Calculate the pH at the equivalence point of the titration. pH = + NH3 HC—CH2—SH C=O Cysteine
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