Chapter 22, Problem 22.167CP

Interpretation Introduction

Interpretation:

To propose a structure for ${\text{H}}_{\text{2}}{\text{S}}_{\text{2}}{\text{O}}_{\text{7}}$

Concept introduction:

${\text{SO}}_3$ dissolves easily in anhydrous ${\text{H}}_{\text{2}}{\text{SO}}_4$ to form ${\text{H}}_{\text{2}}{\text{S}}_{\text{2}}{\text{O}}_{\text{7}}$. ${\text{H}}_{\text{2}}{\text{SO}}_4$ is formed from ${\text{SO}}_3$ in Contact process. Now, ${\text{H}}_{\text{2}}{\text{SO}}_4$ is difficult to store. It is therefore converted to ${\text{H}}_{\text{2}}{\text{S}}_{\text{2}}{\text{O}}_{\text{7}}$. ${\text{H}}_{\text{2}}{\text{S}}_{\text{2}}{\text{O}}_{\text{7}}$ is easier to handle and can be easily converted to ${\text{H}}_{\text{2}}{\text{SO}}_4$ just by adding water.

Given:

${\text{SO}}_3$ dissolves in anhydrous ${\text{H}}_{\text{2}}{\text{SO}}_4$ to form ${\text{H}}_{\text{2}}{\text{S}}_{\text{2}}{\text{O}}_{\text{7}}$