Chapter 8, Problem 8.10P

(a)

Interpretation Introduction

Interpretation:

The molecular class, steric number, and geometry of ${\text{IBr}}_{\text{4}}{}^{\text{-}}$ have to be given.

Concept Introduction:

Molecules can be classified by introducing the terminologies.

Let A represent a central atom, X represent a bonded atom to the central atom and E represent the lone pair of electrons on the central atom.  Thus the centre atom in a molecule can be classified as ${\text{AX}}_{\text{m}}{\text{E}}_{\text{n}}$.

The steric number is a sum of the number of ligands and lone pairs surrounding the central atom.

  $\text{steric}\text{number}\text{=(m+n)}$

where m is the number of ligands and n is the number of lone pairs.

(b)

Interpretation Introduction

Interpretation:

The molecular class, steric number, and geometry of ${\text{PCl}}_{\text{4}}{}^{\text{+}}$ have to be given.

Concept Introduction:

Refer to part (a).

(c)

Interpretation Introduction

Interpretation:

The molecular class, steric number, and geometry of ${\text{BF}}_{\text{4}}{}^{\text{-}}$ has to be given

Concept Introduction:

Refer to part (a).

(d)

Interpretation Introduction

Interpretation:

The molecular class, steric number, and geometry of ${\text{IF}}_{\text{4}}{}^{\text{+}}$ has to be given

Concept Introduction:

Refer to part (a).