Chapter 19, Problem 19.38QP

(a)

Interpretation Introduction

Interpretation: The oxidation of $\text{Zn}$ to ${\text{Zn}}^{+2}$ by hydrogen ions is to be analyzed.

Concept introduction: Hydrogen ions can oxidize those who have more negative standard electrode potential than it. More negative standard electrode potential means the element easily oxidized.

To determine: During standard conditions, $\text{Zn}$ to ${\text{Zn}}^{+2}$ could be oxidize by ${\text{H}}^{+}$ ions

(b)

Interpretation Introduction

Interpretation: The oxidation of ${\text{Fe}}^{+2}$ to ${\text{Fe}}^{+3}$ by hydrogen is to be analyzed.

Concept introduction: Hydrogen ions can oxidize those who have more negative standard electrode potential than it. More negative standard electrode potential means the element easily oxidized.

To determine: During standard conditions, ${\text{Fe}}^{+2}$ to ${\text{Fe}}^{+3}$ could be oxide by hydrogen ions.

(c)

Interpretation Introduction

Interpretation: The oxidation of $\text{Cr}{\left(\text{OH}\right)}_3$ to ${\text{CrO}}_4{}^{-2}$ by hydrogen is to be analyzed.

Concept introduction: Hydrogen ions can oxidize those who have more negative standard electrode potential than it. More negative standard electrode potential means the element easily oxidized.

To determine: During standard conditions, $\text{Cr}{\left(\text{OH}\right)}_3$ to ${\text{CrO}}_4{}^{-2}$ could be oxide by hydrogen ions.

(d)

Interpretation Introduction

Interpretation: The oxidation of $\text{Ni}$ to ${\text{Ni}}^{+2}$ by hydrogen ions is to be analyzed.

Concept introduction: Hydrogen ions can oxidize those who have more negative standard electrode potential than it. More negative standard electrode potential means the element easily oxidized.

To determine: During standard conditions, $\text{Ni}$ to ${\text{Ni}}^{+2}$ could be oxidize by ${\text{H}}^{+}$ ions