Glycine is a diprotic acid, which can potentially undergo two dissociation reactions, one for the a-amino group (-NH;), and the other for the carboxyl (-COOH) group. Therefore, it has two pK, values. The carboxyl group has a pKj of 2.34 and the a-amine group has a pK2 of 9.60. Glycine can exist in fully deprotonated (NH, -CH, -COO"), fully protonated (NH† -CH,-COOH), or zwitterionic form (NH;-CH,-COO-). Match the pH values with the corresponding form of glycine that would be present in the highest concentration in a solution of that pH.
Glycine is a diprotic acid, which can potentially undergo two dissociation reactions, one for the a-amino group (-NH;), and the other for the carboxyl (-COOH) group. Therefore, it has two pK, values. The carboxyl group has a pKj of 2.34 and the a-amine group has a pK2 of 9.60. Glycine can exist in fully deprotonated (NH, -CH, -COO"), fully protonated (NH† -CH,-COOH), or zwitterionic form (NH;-CH,-COO-). Match the pH values with the corresponding form of glycine that would be present in the highest concentration in a solution of that pH.
Chapter22: Carbonyl Alpha-substitution Reactions
Section22.SE: Something Extra
Problem 63AP: As far back as the 16th century, South American Incas chewed the leaves of the coca bush,...
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