Chapter 18.4, Problem 53SSC

Interpretation Introduction

Interpretation:

The substance used to make the buffer solution with $\text{p}\text{H}=9.4$ is to be determined.

Concept introduction:

A buffer solution is a solution in which there is a very slight change in $\text{p}\text{H}$ on the addition of acid or base.

A buffer solution is a conjugate acid-base pair system.

Answer to Problem 53SSC

Ammonia and salt of ammonia have $\text{p}\text{H}=9.4$ .

The amount of base and its salt should be equimolar.

Explanation of Solution

Ammonia and salt of ammonia is a basic buffer.

Its equation is as:

$\text{N}{\text{H}}_3+{\text{H}}_2\text{O}\rightleftharpoons \text{N}{\text{H}}_4{}^{+}+\text{O}{\text{H}}^{-}$

Conclusion

Ammonia and salt of ammonia form a basic buffer system.