Chapter 18, Problem 30QAP

Interpretation Introduction

(a)

Interpretation:

The element which one is oxidized and which one is reduced should be identified in the given reaction.

$\text{2Al(}\text{s}\text{)+3S(}\text{s}\text{)}\to {\text{Al}}_2{\text{S}}_3\text{(}\text{s}\text{)}$.

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 element which one is oxidized and which one is reduced should be identified in the given reaction.

$2{\text{CH}}_4(g)+2{\text{O}}_{\text{2}}(g)\to {\text{CO}}_2(g)+2{\text{H}}_{\text{2}}\text{O(}\text{g}\text{)}$.

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 element which one is oxidized and which one is reduced should be identified in the given reaction.

${\text{4Fe}}_2{\text{O}}_3(s)+3\text{C}(s)\to 2{\text{CO}}_{\text{2}}(g)+4\text{Fe}(s)$.

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.

Interpretation Introduction

(d)

Interpretation:

The element which one is oxidized and which one is reduced should be identified in the given reaction.

${\text{K}}_2{\text{Cr}}_{\text{2}}{\text{O}}_{\text{7}}(aq)+\text{14HCl}(aq)\to 2\text{KCl}(aq)+2{\text{CrCl}}_{\text{3}}(s)+7{\text{H}}_{\text{2}}\text{O}(l)+3{\text{Cl}}_{\text{2}}(g)$.

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.