This can be done by submerging the reaction vessel in a container of water (e.g. Other manganese species are thought to be produced in the reaction, such as Mn(VI) as green potassium manganate, and Mn(IV) as black manganese oxide.Īs it is difficult to determine if there are unreacted chemicals present, we recommend quenching the reaction mixture with water. The reaction may take some time to start, but as heat is produced the reaction speeds up, with the main reaction being:ġ4KMnO 4(s) + 4C 3H 5(OH) 3(l) -> 7K 2CO 3(s) + 7Mn 2O 3(s) +5CO 2(g) +16H 2O(g) + heat This reaction is an example of a spontaneous exothermic reaction in which glycerol is oxidised to carbon dioxide and water (as steam) by potassium permanganate. The reaction of potassium permanganate and glycerol:
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