Chapter 15, Problem 15.47UTC

(a)

Interpretation Introduction

Interpretation:

The following reaction should be classified as oxidation-reduction reaction.

  ${\text{Ca(s)+2H}}_{\text{2}}\text{O(l)}\stackrel{}{\to }{\text{Ca(OH)}}_{\text{2}}{\text{(aq)+H}}_{\text{2}}\text{(g)}$

Concept Introduction:

The chemical reaction in which both oxidation and reduction process takes place is known as redox reaction. In this reaction, transfer of electrons takes place among the elements.

Oxidation is the process in which either loss of electrons, oxidation number increases, or loss of hydrogen atoms takes place. An element is oxidized, when oxidation number increases.

Reduction is the process in which either gain of electrons, oxidation number decreases, or gain of hydrogen atoms takes place. An element is reduced, when oxidation number decreases.

Interpretation Introduction

(b)

Interpretation:

The following reaction should be classified as oxidation-reduction reaction.

  ${\text{Ca(s)+2H}}_{\text{2}}\text{O(l)}\stackrel{}{\to }{\text{Ca(OH)}}_{\text{2}}{\text{(aq)+H}}_{\text{2}}\text{(g)}$

Concept Introduction:

The chemical reaction in which both oxidation and reduction process takes place is known as redox reaction. In this reaction, transfer of electrons takes place among the elements.

Oxidation is the process in which either loss of electrons, oxidation number increases, or loss of hydrogen atoms takes place. An element is oxidized, when oxidation number increases.

Reduction is the process in which either gain of electrons, oxidation number decreases, or gain of hydrogen atoms takes place. An element is reduced, when oxidation number decreases.

Interpretation Introduction

(c)

Interpretation:

The following reaction should be classified as oxidation-reduction reaction.

  ${\text{4Al(s)+3O}}_2\stackrel{}{\to }{\text{2Al}}_2{\text{O}}_3(s)$

Concept Introduction:

The chemical reaction in which both oxidation and reduction process takes place is known as redox reaction. In this reaction, transfer of electrons takes place among the elements.

Oxidation is the process in which either loss of electrons, oxidation number increases, or loss of hydrogen atoms takes place. An element is oxidized, when oxidation number increases.

Reduction is the process in which either gain of electrons, oxidation number decreases, or gain of hydrogen atoms takes place. An element is reduced, when oxidation number decreases.