2 FeS + 9 Na2O2 → 7 Na2O + Fe2O3 + 2 Na2SO4

This is an oxidation-reduction (redox) reaction:

2 S-II - 16 e- → 2 SVI (oxidation)

2 FeII - 2 e- → 2 FeIII (oxidation)

18 O-I + 18 e- → 18 O-II (reduction)

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

Reactants:

  • FeS
    • Names: Iron(II) sulfide source: wikipedia, accessed: 2019-09-27, Iron sulfide source: wikipedia, accessed: 2019-09-27, Ferrous sulfide source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02
    • Appearance: Gray, sometimes in lumps or powder source: wikipedia, accessed: 2019-09-27
  • Na2O2
    • Names: Sodium peroxide source: wikipedia, accessed: 2019-09-28source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04, Disodium dioxide source: wikipedia, accessed: 2019-09-28, Flocool source: wikipedia, accessed: 2019-09-28
    • Appearance: Yellow to white powder source: wikipedia, accessed: 2019-09-28; Yellow-to-white powder source: ICSC, accessed: 2019-09-04

Products:

  • Na2O – Sodium oxide source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04
    • Other names: Disodium oxide source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04, Sodium monoxide source: ICSC, accessed: 2019-09-04, Disodium monoxide source: ICSC, accessed: 2019-09-04
    • Appearance: White solid source: wikipedia, accessed: 2019-09-27; White lumps or powder source: ICSC, accessed: 2019-09-04
  • Fe2O3 – Iron(III) oxide source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-07
    • Other names: Ferric oxide source: wikipedia, accessed: 2019-09-27source: ICSC, accessed: 2019-09-04source: wikidata, accessed: 2019-09-07source: NIOSH NPG, accessed: 2019-09-02, Hematite source: wikipedia, accessed: 2019-09-27, Ferric iron source: wikipedia, accessed: 2019-09-27
    • Appearance: Red-brown solid source: wikipedia, accessed: 2019-09-27; Reddish brown-to-black crystals or powder source: ICSC, accessed: 2019-09-04; Reddish-brown solid. [Note: Exposure to fume may occur during the arc-welding of iron.] source: NIOSH NPG, accessed: 2019-09-02; A fine, red powder of ferric oxide. [Note: Usually used in cake form or impregnated in paper or cloth.] source: NIOSH NPG, accessed: 2019-09-02
  • Na2SO4
    • Names: Sodium sulfate source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04, Sodium sulphate source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02, Sulfate of sodium source: wikipedia, accessed: 2019-09-27
    • Appearance: White crystalline solid | hygroscopic source: wikipedia, accessed: 2019-09-27; White hygroscopic solid in various forms source: ICSC, accessed: 2019-09-04