The graph below represents the titration of an amino acid... B, C, and D are inc

Question

The graph below represents the titration of an amino acid...

B, C, and D are incorrect.

Question 15 of 29 IncorrectX a Sapling Learning Map do Imacmillan learning The graph below represents the titration of an amino acid with NaOH solution. View the titration and answer the questions below (parts a through e). (a) At what pH are about 2 of the amino groups ionized? X.-968 Number |||||||||||||||||||||||||||| | 9.69 2.ID, pH 6.01 (b) Where does the amino acid have a net charge of +1? O O O O D LPK-234 below pH 2.34 at pH = 2.34 at pH = 6.01 at pH = 9.69 O above pH 9.69 | 20 10 15 OH" (equivalents) (c) At what point has enough base been added to react with 'of the COOH groups? continued below...

Explanation / Answer

Titration

Given above plot of titration of an amino acid

(a) at what pH half of amino groups are ionized,

9.69

(b) where does the amino acid have net charge of +1,

below pH 2.34

(c) at what pH enough base has been added to react with 1/2 of the COOH group,

2.34

(d) at which of the given pH, amino acid have the best buffering capacity,

2.34

(e) What is the pI,

6.01

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