Chapter 3, Problem 102QP

Interpretation Introduction

Interpretation:

Whether the chemical formula of iron (III) chloride is ${\text{FeCl}}_3$ or ${\text{FeCl}}_2$ is to be identified.

Concept Introduction:

The periodic table is the tabular arrangement of chemical elements that shows the properties of an element. Iron is a transition metal that shows a variable oxidation state; so, its charge is written as a Roman numeral. An iron ion that exists at a higher oxidation state is called ferric ion while one that exists at a lower oxidation state is called ferrous ion.