Question

Question #e847a

Answer 1

`"Fe"_3"O"_4` is iron (II, III) oxide.

Explanation:

Chemical formation:

This process is described by the Schikorr reaction. Under anaerobic conditions, Iron(II) hydroxide can be oxidised by water to form iron (II,III) oxide and molecular hydrogen.

• `3Fe(OH)_(2(aq)) -> Fe_3O_(4(aq)) + H_(2(g)) + 2H_2O_((l))`

• Iron(II) hydroxide → Iron(II,III) oxide + hydrogen + water

Reasons:

• Iron (II, III) contains iron in two oxidation states, +2 and +3.
• it contains the iron (II), `"Fe"^(2+)`, and iron (III), `"Fe"^(3+)`, ions, which is why its chemical formula is written both as `"Fe"_3"O"_4`, and `"FeO" * "Fe"_2"O"_3`.

`"Fe"_3"O"_4` has a molar mass of 231.533 mol/g.