2 KMnO4 + 3 C2H2O4 → 3 H2O + 5 CO2 + 2 MnO2 + K2CO3

This is an oxidation-reduction (redox) reaction:

2MnVII+6e-→2MnIV(reduction)

6CIII-6e-→6CIV(oxidation)

KMnO4 is an oxidizing agent, C2H2O4 is a reducing agent.

This is a precipitation reaction: MnO2 is the formed precipitate.

This is a gas evolution reaction, CO2 is the formed gas.

Reactants:

• KMnO4 – Potassium manganate(VII)
  • Other names: Potassium permanganate , Chameleon mineral , Condy's crystals ... show morePermanganate of potash Hypermangan , Permanganic acid potassium salt show less
  • Appearance: Purplish-bronze-gray needles | magenta–rose in solution ; Dark purple crystals
• C2H2O4 – Oxalic acid , Ethanedioic acid
  • Other names: Wood bleach , Oxalic acid dihydrate , H2ox ... show moreHOOCCOOH , Ethane-1,2-dioic acid , Oxalate , Ethanedioic acid dihydrate , Oxalic acid diammonium salt , Oxalic acid anhydrous , Ethane-1,2-dioate , Kyselina stavelova , Ethanedionic acid , Ethanedioate , Oxalic acid 2-Hydrate , Ethanedionate , Oxaalzuur , Oxalic Acid , Oxalic acid (aqueous) show less
  • Appearance: White crystals ; Hygroscopic colourless crystals or white powder ; Colorless, odorless powder or granular solid. [Note: The anhydrous form (COOH)2 is an odorless, white solid.]

Products:

• 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
• CO2
  • Names: Carbon dioxide , {{plainlist| , CO2 ... show moreCarbonic acid gas , Dry ice , [CO2] , Carbonic anhydride , R-744 , E-290 , E 290 , E290 , Carbonic acid anhydride , Carbon-12 dioxide , Methanedione , Carbon oxide , CO₂ , [Note: Normal constituent of air (about 300 ppm)]. show less
  • Appearance: Colorless gas ; Odourless colourless compressed liquefied gas ; Colorless, odorless gas. [Note: Shipped as a liquefied compressed gas. Solid form is utilized as dry ice.]
• 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
• K2CO3 – Potassium carbonate
  • Other names: Carbonate of potash , Dipotassium carbonate , Sub-carbonate of potash ... show morePearl ash , Potash , Salt of tartar , Salt of wormwood. , Potassium carbonate (anhydrous) , K2CO3 , Carbonic acid, dipotassium salt , Potassium carbonate, anhydrous , Kaliumcarbonat , Potash, sulfurated show less
  • Appearance: White, hygroscopic solid ; Colourless hygroscopic crystals or hygroscopic white powder