6. Amino acid titration. The graph below shows a titration of an amino acid with NaOH. This experiment reveals several important features of this amino acid. A) What is the identity of the amino acid? [Write its full name.] B) Match the following points in the titration curve. [In the space beside each description (left), write a number (1 - 6) corresponding to a specific pH (right).] The amino acid is fully protonated. 1) pH=0.0 The amino acid is fully deprotonated. 2) pH=3.1 Half of the amino groups are ionized. 3) pH=4.5 The average charge on the carboxyl group 4) pH=6.0 is 0.5. 5) pH=8.0 The side chain has its maximum buffering capacity, functioning as an acid catalyst 6) pH=10.0 or base catalyst. The predominant species contains a protonated amino group, a deprotonated carboxyl group, and a protonated side chain (as shown below). +H3NCHCOOR+ 6. Amino acid titration. The graph below shows a titration of an amino acid with NaOH. This experiment reveals several important features of this amino acid. A) What is the identity of the amino acid? [Write its full name.] B) Match the following points in the titration curve. [In the space beside each description (left), write a number (1 - 6) corresponding to a specific pH (right).] The amino acid is fully protonated. 1) pH=0.0 The amino acid is fully deprotonated. 2) pH=3.1 Half of the amino groups are ionized. 3) pH=4.5 The average charge on the carboxyl group 4) pH=6.0 is 0.5. 5) pH=8.0 The side chain has its maximum buffering capacity, functioning as an acid catalyst 6) pH=10.0 or base catalyst. The predominant species contains a protonated amino group, a deprotonated carboxyl group, and a protonated side chain (as shown below). +H3NCHCOOR+