FeS2 + 14 (Fe)3+ + 8 H2O → 15 (Fe)2+ + 16 H+ + 2 SO42-

This is an oxidation-reduction (redox) reaction:

2 S-I - 14 e- → 2 SVI (oxidation)

14 FeIII + 14 e- → 14 FeII (reduction)

FeS2 is a reducing agent, Fe3+ is an oxidizing agent.

Reactants:

  • FeS2
    • Names: Ferrous disulfide source: wikidata, accessed: 2019-09-02, Fool's gold source: wikidata, accessed: 2019-09-02, Iron disulfide source: wikidata, accessed: 2019-09-02
  • Fe3+
  • H2O – Water, oxidane source: wikipedia, accessed: 2019-09-27
    • Other names: Water (H2O) source: wikipedia, accessed: 2019-09-27, Hydrogen hydroxide (HH or HOH) source: wikipedia, accessed: 2019-09-27, Hydrogen oxide source: wikipedia, accessed: 2019-09-27
    • Appearance: White crystalline solid, almost colorless liquid with a hint of blue, colorless gas source: wikipedia, accessed: 2019-09-27

Products:

  • Fe2+
  • H+
  • SO42- – Sulfate source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-07
    • Other names: Sulfate ion source: wikidata, accessed: 2019-09-07, Sulphate ion source: wikidata, accessed: 2019-09-07, Sulphate source: wikidata, accessed: 2019-09-07