Chapter 9, Problem 9C.9E

(a)

Interpretation Introduction

Interpretation:

The coordination number of ${\left[{\text{NiCl}}_{\text{4}}\right]}^{\text{2-}}$ has to be given.

Concept Introduction:

Ligands:

A ligand is an ion or molecule that binds with to a central metal atom to form coordination complex.  Many ligands are capable of binding metal ions through multiple sites because the ligands have lone pairs on more than one atom.

Coordination number:

The coordination number is the number of ligands attached to the central ion.  the number of bonds depends on the size, charge, and electron configuration of the metal ion and the ligands.

(b)

Interpretation Introduction

Interpretation:

The coordination number of the complex ${\left[\text{Ag}{\left({\text{NH}}_{\text{3}}\right)}_{\text{2}}\right]}^{\text{+}}$ has to be given.

Concept Introduction:

Refer to part (a).

(c)

Interpretation Introduction

Interpretation:

The coordination number of the complex ${\left[\text{Pt}{\text{Cl}}_{\text{2}}{\left(\text{en}\right)}_{\text{2}}\right]}^{\text{2+}}$ has to be given.

Concept Introduction:

Refer to part (a).

(d)

Interpretation Introduction

Interpretation:

The coordination number of the complex ${\left[\text{Cr}\left(\text{edta}\right)\right]}^{\text{-}}$ has to be given.

Concept Introduction:

Refer to part (a).