Question

The results of Exercises 21–23 illustrate an important property of buffered solutions. Which solution in Exercise 21 is the buffered solution and what important property is illustrated by the results?

Short answer

SolutionDis a buffered solution

Step-by-step solution

Buffer solution 

The aqueous solution which takes changes in pH by adding small volumes of base or acid is called buffered solution.

The solution table 

The table can be given as,

Solution	Initial pH	After adding H+	After adding OH-
A	2.96	1.7	4.29
B	8.94	5.49	12.3
C	7	1.7	12.3
D	4.89	4.71	5.07

The buffered solution can be considered as solution d. The preparation of this solution with a conjugate base. Solution D will show small changes in pH because of H+ or OH^-. Thus, this solution resists changes in pH. It is the basic buffer’s property.