Chapter 8, Problem 8B.4P

Interpretation Introduction

Interpretation:

The larger ion among ${\text{Fe}}^{2+}$ and ${\text{Fe}}^{3+}$ has to be predicted.  The reason for the larger size of the ion has to be stated.

Concept introduction:

Haemoglobin is present in blood.  It is composed of two components, the heme group and the globin proteins.  The heme unit consists of the four units of porphyrin ring.  There are six coordination sites present in a haemoglobin unit.