Chapter 4.4, Problem 4.18BFP

(a)

Interpretation Introduction

Interpretation:

The molarity of ${\text{Fe}}^{2+}$ if $21.85\text{ mL}$ of $0.250M{\text{ K}}_{\text{2}}{\text{Cr}}_{\text{2}}{\text{O}}_7$ is required for the titration of $30.0\text{ mL}$ of ${\text{FeSO}}_4$ solution is to be determined.

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.

Oxidation of a species involves the loss of electrons by that species and reduction of a species involves the gain of electrons by that species.

(b)

Interpretation Introduction

Interpretation:

The mass percent of iron in the $2.58\text{g}$ ore is to be determined.

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.

Oxidation of a species involves the loss of electrons by that species and reduction of a species involves the gain of electrons by that species.