The following plot shows a titration curve for the titration of 1.00 L of 1.00 M diprotic acid H 2 A with NaOH.
-A buffer region is indicated by which point(s)a-d?
A)point a
B)points a and c
C)point b
D)points b and d

Question

The following plot shows a titration curve for the titration of 1.00 L of 1.00 M diprotic acid H 2 A with NaOH. 
-A buffer region is indicated by which point(s)a-d?
A)point a 
B)points a and c 
C)point b 
D)points b and d

Quizplus · Accepted Answer

A buffer region is defined as a region on the titration curve where there is a significant amount of both weak acid and its conjugate base present, which allows for the pH to remain relatively constant when small amounts of acid or base are added. This occurs when the acid is partially ionized, but not fully neutralized yet. In the titration curve shown, the buffer region occurs between points a and c, where the pH remains relatively constant with small additions of NaOH. Therefore, the best choice is B, points a and c.

The Following Plot Shows a Titration Curve for the Titration