Chapter 8, Problem 8STP

Interpretation Introduction

Interpretation: The reason for ${\text{H}}_{\text{2}}\text{S}$ molecule to not be linear needs to be explained.

Concept Introduction: An electron dot structure represents the arrangement of total valence electrons in a molecule. Here, electrons are represented as dots in pairs to show the lone pairs as well as the bond pairs.

Explanation of Solution

The electron dot structure of ${\text{H}}_{\text{2}}\text{S}$ molecule is as follows:

  

From the above structure, it is clear that it has 2 bond pairs and 2 lone pairs. The structure can show bond pair-lone pair repulsion. Due to this repulsion, the H-S bonds are slightly bent and it has a bent shape rather than linear.

Thus, the shape of ${\text{H}}_{\text{2}}\text{S}$ molecule is not linear due to the presence of lone pair of electrons on the sulfur atom which causes bond pair-lone pair repulsion in the molecule.