Chapter 4, Problem 4.58P

a)

Interpretation Introduction

Interpretation: Oxidizing and reducing agent in below reaction should be determined.

  ${\text{8H}}^{+}\left(aq\right)+{\text{Cr}}_{\text{2}}{\text{O}}_7^{2-}\left(aq\right)+3{\text{SO}}_3^{2-}\left(aq\right)\to 2{\text{Cr}}^{3+}\left(aq\right)+3{\text{SO}}_4^{2-}\left(g\right)+4{\text{H}}_2\text{O}\left(l\right)$

Concept introduction:Change in oxidation number of a molecule, ion or atom in reaction is termed as redox reaction. It occurs due to electron transfer between two species.

Oxidizing agent is substance that gains its electrons. It reduces itself and oxidizes other species in chemical reaction. Reducing agent is substance that loses its electrons in reaction. Thus, reduces others and oxidizes it.

b)

Interpretation Introduction

Interpretation: Oxidizing and reducing agent in below reaction should be determined.

  ${\text{2MnO}}_4^{-}\left(aq\right)+10{\text{Cl}}^{-}\left(aq\right)+{\text{16H}}^{+}\left(aq\right)\to 5{\text{Cl}}_2\left(aq\right)+{\text{2Mn}}^{2+}\left(g\right)+8{\text{H}}_2\text{O}\left(l\right)$

Concept introduction:Change in oxidation number of a molecule, ion or atom in reaction is termed as redox reaction. It occurs due to electron transfer between two species.

Oxidizing agent is substance that gains its electrons. It reduces itself and oxidizes other species in chemical reaction. Reducing agent is substance that loses its electrons in reaction. Thus, reduces others and oxidizes it.