Chapter 16, Problem 16.104QP

(a)

Interpretation Introduction

To determine: The validation corresponding to the statement of the co-worker that a buffer solution of $\text{pH}=8$ can be prepared by mixing $72.00\text{mL}$ of $0.200\text{M}$ ${\text{NH}}_{\text{3}}$ solution with $128.0\text{mL}$ of $0.200\text{M}{\text{NH}}_{\text{4}}\text{Cl}$ solution.

Interpretation: The validation corresponding to the statement of the co-worker that a buffer solution of $\text{pH}=8$ can be prepared by mixing $72.00\text{mL}$ of $0.200\text{M}$ ${\text{NH}}_{\text{3}}$ solution with $128.0\text{mL}$ of $0.200\text{M}{\text{NH}}_{\text{4}}\text{Cl}$ solution is to be stated.

Concept introduction: A buffer solution is defined as a solution of a weak acid and its conjugate base or a weak base and its conjugate acid that resists the change in $\text{pH}$ on the addition of small quantity of acid or base.

(b)

Interpretation Introduction

To determine: The effect on $\text{pH}$ on the dilution of resultant buffer solution to a volume of $1.00\text{L}$.

Interpretation: The effect on $\text{pH}$ on the dilution of resultant buffer solution to a volume of $1.00\text{L}$ is to be predicted.

Concept introduction: The order of a reaction is defined as the sum of powers to which the concentration terms are raised in the rate equation of the reaction.