2 FeCr₂O₄ + 7 Na₂O₂ → Fe₂O₃ + 4 Na₂CrO₄ + 3 Na₂O

This is an oxidation-reduction (redox) reaction:

FeCr₂O₄ is a reducing agent, FeCr₂O₄ is a reducing agent, Na₂O₂ is an oxidizing agent.

Reactants:

• FeCr₂O₄
  • Names: Iron(II) chromite
• Na₂O₂
  • Names: Sodium peroxide , Disodium dioxide , Flocool ... show moreSolozone , Disodium peroxide , Sodium dioxide , Sodium superoxide show less
  • Appearance: Yellow to white powder ; Yellow-to-white powder

Products:

• Fe₂O₃ – Iron(III) oxide
  • Other names: Ferric oxide , Hematite , Ferric iron ... show moreRed iron oxide , Rouge , Maghemite , Colcothar , Iron sesquioxide , Rust , Ochre , Iron oxide dust and fume (as Fe) , Iron oxide red , Red oxide , Anhydrous ferric oxide , Iron (III) oxide , Diiron trioxide , Iron trioxide , Ferric sesquioxide , Iron(III) oxide [Iron oxide dust and fume (as Fe)] , Iron(III)oxide [Rouge] show less
  • Appearance: Red-brown solid ; Reddish brown-to-black crystals or powder ; Reddish-brown solid. [Note: Exposure to fume may occur during the arc-welding of iron.] ; A fine, red powder of ferric oxide. [Note: Usually used in cake form or impregnated in paper or cloth.]
• Na₂CrO₄ – Sodium chromate
  • Other names: Chromic acid , (Na2CrO4) , Disodium salt ... show moreChromium disodium oxide , Rachromate , H2CrO4 , Chromic acid, disodium salt , Disodium chromate , Chromiumsodium oxide , Sodium chromate(VI) , Disodium chromate (VI) , Disodium chromium tetraoxide show less
  • Appearance: Yellow crystals ; Yellow hygroscopic crystals
• Na₂O – Sodium oxide
  • Other names: Disodium oxide , Sodium monoxide , Disodium monoxide
  • Appearance: White solid ; White lumps or powder