Question #e847a

1 Answer
Aug 7, 2015

Answer:

#"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.

http://worldfamos.blogspot.ro/2009/03/why-is-hematite-fe3o4.html