Chapter 22, Problem 105A

a.

Interpretation Introduction

Interpretation: To interpret whether the process is oxidation or reduction.

Concept Introduction: If any species loses an electron, then the process is termed oxidation while when an electron is gained by any species, then reduction takes place.

Answer to Problem 105A

The given process is reduction.

Explanation of Solution

The given process is as follows:

  ${\text{Fe}}^{3+}+{\text{e}}^{-}\to {\text{Fe}}^{2+}$

In this process, iron gains an electron; thus, it is an oxidation process.

b.

Interpretation Introduction

Interpretation: To interpret whether the process is oxidation or reduction.

Concept Introduction: If any species loses an electron, then the process is termed oxidation while when an electron is gained by any species, then reduction takes place.

Answer to Problem 105A

The given process is reduction.

Explanation of Solution

The given process is as follows:

  ${\text{Cl}}_2+2{\text{e}}^{-}\to 2{\text{Cl}}^{-}$

In this process, chlorine gains two electrons resulting in a reduction process.

c.

Interpretation Introduction

Interpretation: To interpret whether the process is oxidation or reduction.

Concept Introduction: If any species loses an electron, then the process is termed oxidation while when an electron is gained by any species, then reduction takes place.

Answer to Problem 105A

The given process is reduction.

Explanation of Solution

The given process is as follows:

  ${\text{Fe}}^{3+}+3{\text{e}}^{-}\to \text{Fe}$

In this process, iron gains three electrons; thus, it is a reduction process.

d.

Interpretation Introduction

Interpretation: To interpret whether the process is oxidation or reduction.

Concept Introduction: If any species loses an electron, then the process is termed oxidation while when an electron is gained by any species, then reduction takes place.

Answer to Problem 105A

The given process is oxidation.

Explanation of Solution

The given process is as follows:

  ${\text{Zn}}^{2+}\to \text{Zn}+2{\text{e}}^{-}$

In this process, zinc loses two electrons; thus, it is an oxidation process.