# What is the oxidation state of Cl in HClO_3?

Mar 5, 2016

A $+ V$ oxidation state is indicated.

#### Explanation:

Chloric acid is moderately strong in water. Since the parent acid is NEUTRAL, the sum of the individual, elemental numbers must be $0$.

Thus ${H}_{O N}$ $+$ $C {l}_{O N}$ $+$ $3 \times {O}_{O N}$ $=$ $0$.

${O}_{O N}$ is usually $- I I$, and ${H}_{O N}$ is usually $+ I$. Given these numbers, it is fairly easy to assign an oxidation state of $+ V$ on the chlorine.

What are the respective oxidation states of $C l$ in hypochlorous acid, $H C l O$, and perchloric acid, $H C l {O}_{4}$?