At a physiological pH of 7.4,amino acids exist as zwitterions.At a very low pH (in an acid solution) ,both the amine group and the carboxylic acid group on an amino acid are protonated.Which acid group is the stronger acid?
A) "-NH2"
B) "-NH3+"
C) "-COOH"
D) "-COO-"
E) "-H3O+"
Correct Answer:
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I.
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