Chapter 4, Problem 4.82P

(a)

Interpretation Introduction

Interpretation:

The sulfuric acid act as an oxidizing agent or an acid in the following reaction is to be identified.

$4{\text{H}}^{+}\left(aq\right)+{\text{SO}}_4^{2-}\left(aq\right)+2\text{NaI}\left(s\right)\to 2{\text{Na}}^{+}\left(aq\right)+{\text{I}}_2\left(s\right)+{\text{SO}}_2\left(g\right)+2{\text{H}}_2\text{O}\left(l\right)$

Concept introduction:

A redox reaction is a type of reaction that involves the change in oxidation number of a molecule, atom or ion changes due to the transfer of an electron from one species to another.

An oxidizing agent is a substance that oxidizes another species and itself gets reduced in a chemical reaction. A reducing agent is the one that reduces another species and itself gets oxidized in a chemical reaction.

(b)

Interpretation Introduction

Interpretation:

The sulfuric acid act as an oxidizing agent or an acid in the following reaction is to be identified.

${\text{BaF}}_2\left(s\right)+2{\text{H}}^{+}\left(aq\right)+{\text{SO}}_4^{2-}\left(aq\right)\to 2\text{HF}\left(aq\right)+{\text{BaSO}}_4\left(s\right)$

Concept introduction:

A redox reaction is a type of reaction that involves the change in oxidation number of a molecule, atom or ion changes due to the transfer of an electron from one species to another.

An oxidizing agent is a substance that oxidizes another species and itself gets reduced in a chemical reaction. A reducing agent is the one that reduces another species and itself gets oxidized in a chemical reaction.