Question

You TE TENTAg question 1-2
An amino acid has one protonated group in its side chain (R). the pki, pk2, and pkr values of
this amino acid are 1.88,9.60, and 3.65. Choose the correct statement.
a. Most of the molecules will have a net charge of 0 at pH=3.65
b. All the molecules will have a deprotonated R group at pH=2.77
c. Most of the molecules will have a net charge of -1 at pH=7.0
d. During titration with a strong base, deprotonation starts with the R group
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Answer 1

Explanation:

c. Most of the molecules will have a net charge of -1 at pH=7.0