3 ClO4- + 8 (Cr)3+ + 40 OH- → 8 CrO42- + 3 (Cl)- + 20 H2O

This is an oxidation-reduction (redox) reaction:

3 ClVII + 24 e- → 3 Cl-I (reduction)

8 CrIII - 24 e- → 8 CrVI (oxidation)

ClO4- is an oxidizing agent, Cr3+ is a reducing agent.

Reactants:

  • ClO4-
  • Cr3+
  • OH- – Hydroxide source: wikipedia, accessed: 2019-09-27
    • Other names: Hydroxide ion source: wikidata, accessed: 2019-09-07

Products:

  • CrO42-
    • Cl-
    • 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