CrO42- + 3 (Fe)2+ + 8 H+ → (Cr)3+ + 3 (Fe)3+ + 4 H2O

This is an oxidation-reduction (redox) reaction:

CrVI + 3 e- → CrIII (reduction)

3 FeII - 3 e- → 3 FeIII (oxidation)

CrO42- is an oxidizing agent, Fe2+ is a reducing agent.

Reactants:

  • CrO42-
    • Fe2+
    • H+

    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