3 S₂O₃^2- + 4 Cr₂O₇^2- + 26 H⁺ → 8 (Cr)³⁺ + 6 SO₄^2- + 13 H₂O

This is an oxidation-reduction (redox) reaction:

S₂O₃^2- is a reducing agent, Cr₂O₇^2- is an oxidizing agent.

Reactants:

• S₂O₃^2-
• Cr₂O₇^2-
• H⁺

Products:

• Cr³⁺
• SO₄^2- – Sulfate
  • Other names: Sulfate ion , Sulphate ion , Sulphate
• H₂O – Water, oxidane
  • Other names: Water (H2O) , Hydrogen hydroxide (HH or HOH) , Hydrogen oxide ... show moreDihydrogen monoxide (DHMO) (systematic name) , Hydrogen monoxide , Dihydrogen oxide , Hydric acid , Hydrohydroxic acid , Hydroxic acid , Hydrol , Μ-oxido dihydrogen , Κ1-hydroxyl hydrogen(0) show less
  • Appearance: White crystalline solid, almost colorless liquid with a hint of blue, colorless gas