S₂O₈^2- + (Mn)²⁺ + 4 OH^- → MnO₂ + 2 SO₄^2- + 2 H₂O

This is an oxidation-reduction (redox) reaction:

Mn²⁺ is a reducing agent, S₂O₈^2- is an oxidizing agent.

Reactants:

• S₂O₈^2-
• Mn²⁺
• OH^- – Hydroxide
  • Other names: Hydroxide ion

Products:

• MnO₂ – Manganese oxide , Manganese(IV) oxide
  • Other names: Manganese dioxide , Pyrolusite , Hyperoxide of manganese ... show moreBlack oxide of manganese , Manganic oxide , MnO2 , MnO₂ , Manganese(IV)oxide , Manganese peroxide show less
  • Appearance: Brown-black solid ; Black-to-brown powder
• 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