What is the chemical formula for ferric acid?

The correct chemical formula for ferric acid is not A. The proper chemical formula for ferric acid actually corresponds to the compound that contains iron in the +3 oxidation state, typically represented in various forms but often referred to in association with ferric salts. Ferric acid specifically is a theoretical compound derived from ferric ions.

The choice of A may seem tempting because it resembles an iron compound, but Fe2O4 is not the common representation for a ferric compound as ferric acid. Ferric acid itself is often encountered in the context of hydrated forms of ferric oxides or ferric salts interacting with acids.

To clarify the other options:

• H2SO4 is sulfuric acid and does not contain iron.

• FeCl3, which is ferric chloride, is a salt of ferric acid but does not represent the acid itself.

• HCl is hydrochloric acid, which is not related to iron at all.

A better understanding of the chemistry involved reveals that ferric acid, typically recognized in a broader context as ferric salts, emphasizes the role of iron rather than trying to pin it to a specific and lesser-known formula like Fe2O4.