14 H3O+ + Cr2O72- + 6 (Fe)2+ → 2 (Cr)3+ + 6 (Fe)3+ + 21 H2O

This is an oxidation-reduction (redox) reaction:

2 CrVI + 6 e- → 2 CrIII (reduction)

6 FeII - 6 e- → 6 FeIII (oxidation)

Cr2O72- is an oxidizing agent, Fe2+ is a reducing agent.

Reactants:

  • H3O+
    • Names: Hydronium source: wikidata, accessed: 2019-09-07, Hydroxonium source: wikidata, accessed: 2019-09-07, H3O(+) source: wikidata, accessed: 2019-09-07
  • Cr2O72-
  • Fe2+

Products:

  • Cr3+
  • 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