Chapter 20, Problem 87E

(a)

Interpretation Introduction

To determine: The oxidation number of iron in iron oxyhydroxide $\left(\text{Fe}\left(\text{O}\right)\left(\text{OH}\right)\right)$ assuming the oxidation state of oxygen is $-2$ .

(b)

Interpretation Introduction

To determine: The oxidation number of iron in magnetite $\left({\text{Fe}}_3{\text{O}}_4\right)$ assuming the oxidation number of oxygen is $-2$ .

(c)

Interpretation Introduction

To determine: The oxidation number of two different kinds of ${\text{Fe in Fe}}_{\text{2}}{\text{O}}_3$ and their relative stoichiometry in ${\text{Fe}}_3{\text{O}}_4$ .