# What is the formula for iron (III) oxide?

May 16, 2018

Is it not $F {e}_{2} {O}_{3}$, i.e. $\text{ferric oxide.....}$

#### Explanation:

The $+ I I I$ oxidation states denotes the $\text{ferric ion...}$ Rust is thus formally $2 \times F {e}^{3 +} + 3 \times {O}^{2 -}$, the which formulation gives a NEUTRAL salt. Rust prevention is a HUGE industrial and commercial concern....

May 16, 2018

$F {e}_{2} {O}_{3}$
To name a compound in which the first element is a transition metal and there are roman numerals, find out the charge of the non-transition metal. In this case, if oxygen were to get 8 valence electrons, from its typical 6, it would gain 2. Electrons have a negative charge so its charge would be -2. There are 3 oxygen, as stated by the roman numerals. The resulting answer would be $F {e}_{2} {O}_{3}$. If you find that confusing here's a diagram on naming compounds like this and others.