Chapter 8, Problem 67E

Interpretation Introduction

Interpretation:

An explanation corresponding to the given statement “For some molecules and ions, a Lewis structure that satisfies the octet rule does not lead to the lowest formal charges, and a Lewis structure that leads to the lowest formal charge does not satisfy the octet rule.” using hydrogen sulfite ion as an example is to be stated.

Concept introduction: Hydrogen sulfite is a weak acid with $p{K}_a=6.97$ . It is the conjugate base of sulfurous acid $\left({\text{H}}_{\text{2}}{\text{SO}}_{\text{3}}\right)$

${\text{H}}_{\text{2}}{\text{SO}}_{\text{3}}\rightleftharpoons {\text{HSO}}_3{}^{-}{\text{+H}}^{+}$

The molecular weight of hydrogen sulfite is $\text{81}\text{.065}\text{g/mol}$ Hydrogen sulfite salts are prepared by treatment of excess sulfur dioxide with alkaline salts.

The sulfite ion is conjugate base of hydrogen sulphite ion.

${\text{HSO}}_3^{-}\rightleftharpoons {\text{SO}}_{\text{3}}{}^{-}{\text{+H}}^{+}$

Hydrogen sulfite is also used as reducing agent. It used in drugs also.

To determine: The explanation of the above given statement using hydrogen sulfite ion as an example.