CrO72- + 9 (Fe)2+ + 14 H+ → (Cr)3+ + 9 (Fe)3+ + 7 H2O

This is an oxidation-reduction (redox) reaction:

CrXII + 9 e- → CrIII (reduction)

9 FeII - 9 e- → 9 FeIII (oxidation)

CrO72- is an oxidizing agent, Fe2+ is a reducing agent.

Reactants:

  • CrO72-
  • 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