Chapter 8, Problem 8.47QP

(a)

Interpretation Introduction

Interpretation:

The conjugate acid-base pairs for the reversible reaction of ammonium ion with cyanide ion have to be identified.

Concept Introduction:

Bronsted-Lowry acid:  According to Brønsted-Lowry theory, an acid is a proton donor.

Bronsted-Lowry base:  According to Brønsted-Lowry theory, a base is a proton acceptor.

When a Brønsted-Lowry acid donates a proton to a Brønsted-Lowry base, the base that

accepts the proton becomes a conjugate acid.  Contrastingly, the acid that donated the

proton becomes a conjugate base.

    $\begin{array}{l}\text{HX}\text{+}\text{Y}\stackrel{}{\rightleftharpoons }{\text{HY}}^{\text{+}}\text{+}{\text{X}}^{\text{-}}\\ \text{Acid}\text{Base}\text{Conjugate}\text{acid}\text{Conjugate}\text{base}\\ \\ {\text{HY}}^{\text{+}}\text{and}\text{Y}\text{are}\text{Conjugate}\text{acid-base}\text{pair}\\ \\ \text{HX}\text{and}{\text{X}}^{\text{-}}\text{are}\text{Conjugate}\text{acid-base}\text{pair}\end{array}$

(b)

Interpretation Introduction

Interpretation:

The conjugate acid-base pairs for the reversible reaction of carbonate ion with hydrogen chloride have to be identified.

Concept Introduction:

Refer to part a.