Question

A 100 ml solution of 0.1 M glycine at pH 1.72 was titrated with 2 M NaOH solution. During the titration, the pH was monitored and the results were plotted on the graph shown. Key points in the titration curve are labelled I to V on the graph. For each of the statements below, identify the appropriate key point in the titration. (a) At what point will glycine exist predominately as a zwitterion? (1 mark) (b) At what point is the pH equal to the pKa of the carboxyl group? (1 mark) (c) The point where the pH is equal to the pKa of the amino group? (1 mark)

          A 100 ml solution of 0.1 M glycine at pH 1.72 was titrated with 2 M NaOH solution. During the titration, the pH was monitored and the results were plotted on the graph shown. Key points in the titration curve are labelled I to V on the graph. For each of the statements below, identify the appropriate key point in the titration.

(a) At what point will glycine exist predominately as a zwitterion? (1 mark)
(b) At what point is the pH equal to the pKa of the carboxyl group? (1 mark)
(c) The point where the pH is equal to the pKa of the amino group? (1 mark)

A 100 ml solution of 0.1 M glycine at pH 1.72 was titrated with 2 M NaOH solution. During the titration, the pH was monitored and the results were plotted on the graph shown. Key points in the titration curve are labelled I to V on the graph. For each of the statements below, identify the appropriate key point in the titration.

(a) At what point will glycine exist predominately as a zwitterion? (1 mark)
(b) At what point is the pH equal to the pKa of the carboxyl group? (1 mark)
(c) The point where the pH is equal to the pKa of the amino group? (1 mark)

Added by Edward B.

Chemistry: Structure and Properties

Nivaldo Tro 2nd Edition

Instant Answer

Solved by Expert Preet J

02/20/2022

Step 1

This is typically the midpoint of the titration curve, so it would be point M. Show more…

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A 100 ml solution of 0.1 M glycine at pH 1.72 was titrated with 2 M NaOH solution. During the titration, the pH was monitored and the results were plotted on the graph shown. Key points in the titration curve are labelled I to V on the graph. For each of the statements below, identify the appropriate key point in the titration. (a) At what point will glycine exist predominately as a zwitterion? (1 mark) (b) At what point is the pH equal to the pKa of the carboxyl group? (1 mark) (c) The point where the pH is equal to the pKa of the amino group? (1 mark)