Chapter F, Problem K.7E

(a)

Interpretation Introduction

Interpretation:

The substance that is oxidized and the substance that is reduced has to be identified by the change in oxidation numbers for the given redox reaction.

    ${\text{CH}}_{\text{3}}\text{OH(aq)}+{\text{O}}_{\text{2}}(g)\to HCOOH(aq)+{\text{H}}_{\text{2}}\text{O}(l)$

Concept Introduction:

In redox reactions, oxidizing agent is the one that gets reduced by causing oxidation.  These agents can be ions, elements, or even compounds.  In oxidation, the oxidation number increases due to loss of electrons.

In redox reactions, reducing agent is the one that gets oxidized by causing reduction.  These agents can be ions, elements, or even compounds.  In reduction, the oxidation number decreases due to gain of electrons.

(b)

Interpretation Introduction

Interpretation:

The substance that is oxidized and the substance that is reduced has to be identified by the change in oxidation numbers for the given redox reaction.

    ${\text{2MoCl}}_{\text{5}}\text{(s)}+{\text{5Na}}_{\text{2}}\text{S(s)}\to {\text{2MoS}}_{\text{2}}(\text{s})+\text{10NaCl}(\text{s})+S(s)$

Concept Introduction:

Refer part (a).

(c)

Interpretation Introduction

Interpretation:

The substance that is oxidized and the substance that is reduced has to be identified by the change in oxidation numbers for the given redox reaction.

    ${\text{3Tl}}^{\text{+}}\text{(aq)}\to \text{2Tl}(\text{s})+{\text{Tl}}^{\text{3+}}\text{(aq)}$

Concept Introduction:

Refer part (a).