Chapter 7, Problem 73QRT

(a)

Interpretation Introduction

Interpretation:

Lewis structure for ${\text{C}}_{\text{4}}{\text{O}}_{\text{4}}{}^{\text{2-}}$ has to be drawn.

Concept Introduction:

Lewis structures are diagrams that represent the chemical bonding of covalently bonded molecules and coordination compounds.

Electron geometry is the shape of a molecule predicted by considering both bond electron pairs and lone pair of electrons.

Molecular geometry is the shape of a molecule predicted by considering only bond pair of electrons

Geometry of different type of molecules with respect to the number of electron pairs are mentioned below,

$\begin{array}{ccccc}\begin{array}{l}Typeof\\ Molecule\end{array}& \begin{array}{l}No.ofatoms\\ bondedtocentralatoms\end{array}& \begin{array}{l}No.oflonepairs\\ oncentralatom\end{array}& \begin{array}{l}Arrangementof\\ electronpairs\end{array}& \begin{array}{l}Molecular\\ Geometry\end{array}\\ A{B}_2& 2& 0& Linear& Linear\\ A{B}_3& 3& 0& Trigonalplanar& Trigonalplanar\\ A{B}_4& 4& 0& Tetrahedral& Tetrahedral\\ A{B}_5& 5& 0& Trigonalbipyramidal& Trigonalbipyramidal\\ A{B}_6& 6& 0& Octahedral& Octahedral\end{array}$

(b)

Interpretation Introduction

Interpretation:

Hybridisation of each carbon atom in ${\text{C}}_{\text{4}}{\text{O}}_{\text{4}}{}^{\text{2-}}$ has to be described.

Concept Introduction:

Refer to (a).

(c)

Interpretation Introduction

Interpretation:

Whether there is any inconsistency between the molecular shape and the predicted bond angles has to be determined.