Fe3O4 + 4 H2SO4 → FeSO4 + Fe2(SO4)3 + 4 H2O – Balanced equation

Or you want a quick look:

This is an acid-base reaction (neutralization): Fe3O4 is a base, H2SO4 is an acid.

This is an oxidation-reduction (redox) reaction:

Fe8/3 + 2/3 e- FeII (reduction)

2 Fe8/3 - 2/3 e- 2 FeIII (oxidation)

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Fe3O4 is both an oxidizing and a reducing agent (disproportionation (dismutation)).


  • Fe3O4Iron(II) iron(III) oxide
    • Other names: Iron(II,III) oxide , Ferrous ferric oxide , Ferroso ferric oxide
    • Appearance: Solid black powder
  • H2SO4Sulfuric acid
    • Other names: Oil of vitriol , Sulfuric acid, concentrated (> 51% and , H2SO4
    • Appearance: Clear, colorless liquid ; Odourless colourless oily hygroscopic liquid ; Colorless to dark-brown, oily, odorless liquid. [Note: Pure compound is a solid below 51°F. Often used in an aqueous solution.]


  • FeSO4Iron(II) sulphate
    • Other names: Iron(II) sulfate , Ferrous sulfate , Green vitriol
    • Appearance: White crystals (anhydrous) | White-yellow crystals (monohydrate) | Blue-green crystals (heptahydrate)
  • Fe2(SO4)3Iron(III) sulfate
    • Other names: Ferric sulfate , Sulfuric acid , Iron(3+) salt (3:2)
    • Appearance: Grayish-white crystals
  • H2OWater, oxidane
    • Other names: Water (H2O) , Hydrogen hydroxide (HH or HOH) , Hydrogen oxide
    • Appearance: White crystalline solid, almost colorless liquid with a hint of blue, colorless gas
READ  CuO + H2O → Cu(OH)2 – Balanced equation
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