Chapter 18, Problem 18.19P

(a)

Interpretation Introduction

Interpretation:

The acid, base and conjugate acid-base pair for the given ${\text{NH}}_{\text{4}}^{\text{+}}\text{+}{\text{CN}}_{}^{\text{-}}\underset{}{\rightleftharpoons }{\text{NH}}_{\text{3}}\text{+}\text{HCN}$ has to be identified

Concept introduction:

Conjugate acid-Base pairs:

The acid donates the proton to form its conjugate base and the base accepts a proton to form its conjugate acid.

When an acid is dissolved in water, the acid $\text{(HA)}$ donates a proton to water to form a new acid (conjugate acid) and a new base (conjugate base).

The pair of an Acid –Base differs by a proton called conjugated Acid-Base pair.

(b)

Interpretation Introduction

Interpretation:

The acid, base and conjugate acid-base pair for the given ${\text{H}}_{\text{2}}\text{O}\text{+}{\text{HS}}_{}^{\text{-}}\underset{}{\rightleftharpoons }{\text{OH}}_{}^{\text{-}}\text{+}{\text{H}}_{\text{2}}\text{S}$ has to be identified.

Concept introduction:

Conjugate acid-Base pairs:

The acid donates the proton to form its conjugate base and the base accepts a proton to form its conjugate acid.

When an acid is dissolved in water, the acid $\text{(HA)}$ donates a proton to water to form a new acid (conjugate acid) and a new base (conjugate base).

The pair of an Acid –Base differs by a proton called conjugated Acid-Base pair.

(c)

Interpretation Introduction

Interpretation:

The acid, base and conjugate acid-base pair for the given ${\text{HSO}}_{\text{3}}^{\text{-}}\text{+}{\text{CH}}_{\text{3}}{\text{NH}}_{\text{2}}\underset{}{\rightleftharpoons }{\text{SO}}_{\text{3}}^{\text{2-}}\text{+}{\text{CH}}_{\text{3}}{\text{NH}}_{\text{3}}^{\text{+}}$ has to be identified

Concept introduction:

Conjugate acid-Base pairs:

The acid donates the proton to form its conjugate base and the base accepts a proton to form its conjugate acid.

When an acid is dissolved in water, the acid $\text{(HA)}$ donates a proton to water to form a new acid (conjugate acid) and a new base (conjugate base).

The pair of an Acid –Base differs by a proton called conjugated Acid-Base pair.