Reduction of potassium permanganate
diluted potassium permanganate solution
sulphuric acid 10% Xi R 36/38 S (1/2)-26-30-45
hydrogen peroxide solution 3.5%
- Safety goggles!
- One adds about 0.5 ml diluted potassium permanganate solution to a test tube and then adds approx. 0.5 ml of diluted sulphuric acid.
- Now one adds 1 ml hydrogen peroxide solution 3.5%. Together with somewhat of a gas formation the solution is rapidly declorized.
DisposalThe diluted reaction mixture can be discharged into the drainage.
Hydrogen peroxide can be oxidized in an acid milieu with the strongly oxidizing agent Mn(VII), hereby Mn(II) and elementary oxygen are produced.
2 MnO4- + 6 H+ + 5 H2O2 --> 2 Mn2+ + 5 O2 + 8 H2O
derived from experiment 3., "KMnO4 + H2O2", p.82,