Chapter 17, Problem 43AE

(a)

Interpretation Introduction

Interpretation:

Whether indicated equation represents oxidation or not has to be determined.

  $\text{Mg}\to {\text{Mg}}^{2+}$

Concept Introduction:

A reduction half reaction is accompanied by addition of electrons while a oxidation half reaction is accompanied by loss of electrons. A general reduction process that occurs in reduction half-cell is represented as follows:

  ${\text{M}}^{n+}+{\text{e}}^{-}\to \text{Mn}$

A general oxidation process that occurs in oxidation half-cell is represented as follows:

  $\text{M}\to {\text{M}}^{n+}+{\text{e}}^{-}$

Here

$n$ represents number of electrons gained or lost.

(b)

Interpretation Introduction

Interpretation:

Whether indicated equation represents oxidation or not has to be determined.

  ${\text{KMnO}}_4\to {\text{MnO}}_{\text{2}}$

Concept Introduction:

Refer to part (a).

(c)

Interpretation Introduction

Interpretation:

Whether indicated equation represents oxidation or not has to be determined.

  ${\text{SO}}_2\to {\text{SO}}_3$

Concept Introduction:

Refer to part (a).

(d)

Interpretation Introduction

Interpretation:

Whether indicated equation represents oxidation or not has to be determined.

  ${\text{Cl}}_{\text{2}}{\text{O}}_{\text{3}}\to {\text{Cl}}^{-}$

Concept Introduction:

Refer to part (a).