What is the charge of iron in the iron oxide compound, #Fe_2O_3#?

1 Answer
May 19, 2017

Answer:

#3+#

Explanation:

Iron(III) oxide is a neutral compound, which implies the net charge of the compound equals #0#; i.e. the charges of all the atoms must add up to #0#. Oxygen in nearly all cases has a charge of #2-# (except for a few compounds such as potassium superoxide, #KO_2#), so the total ionic charge the #O# atoms exhibit is #3(-2) = -6#. If two #Fe# atoms equalize this charge and make it neutral, the charge (oxidation state) of #Fe# in this compound must be #3+#.