16 HCl (aq) + 2 KMnO4 (aq) + 5 Na2C2O4 (aq) → 8 H2O (l) + 10 CO2 (g) + 10 NaCl (aq) + 2 KCl (aq) + 2 MnCl2 (aq)
16 HCl (aq) + 2 KMnO4 (aq) + 5 Na2C2O4 (aq) → 8 H2O (l) + 10 CO2 (g) + 10 NaCl (aq) + 2 KCl (aq) + 2 MnCl2 (aq)
This is an oxidation-reduction (redox) reaction:
2 MnVII + 10 e– → 2 MnII (reduction)
10 CIII – 10 e– → 10 CIV (oxidation)
KMnO4 is an oxidizing agent, Na2C2O4 is a reducing agent.
This is a gas evolution reaction, CO2 is the formed gas.