What is the chemical formula of iron(Ill) sulfide?

1 Answer
anor277
Jan 28, 2016

#Fe_2S_3#; i.e. an analogue of ferric oxide, #Fe_2O_3#.

Explanation:

See this [site.](https://en.wikipedia.org/wiki/Iron%28III%29_sulfide)

Sulfur typically has a #-2# oxidation state (it is a Group VI atom, and its redox chemistry follows that of oxygen). And #Fe^(3+)#, ferric ion, has a #+3# oxidation state. We cross multiply and get the given formula.

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