Chapter 14, Problem 14.7P

(a)

Interpretation Introduction

Interpretation:

The oxidation state of each element present in ${\text{NaBH}}_{\text{4}}{\text{, Al(BH}}_{\text{4}}{\text{)}}_{\text{3}}{\text{, and LiAlH}}_{\text{4}}$ has to be given.

Concept Introduction:

Oxidation state:

The number of electrons lost or gain from an atom in the formation of molecule is known as oxidation number.

(b)

Interpretation Introduction

Interpretation:

Lewis structure for the polyatomic anion in ${\text{NaBH}}_{\text{4}}$ has to be written and shape of ion has to be predicted.

Concept Introduction:

Poly atomic ion:

The ion, which contains more than one atoms in known as poly atomic ion.