Demonstration of the reaction between potassium permanganate and wax
name: Potassium permanganate oxidizes hydrocarbons of wax
Wear lab gloves and eye protection.
There is a serious fire risk - a fire extinguisher should be ready. Make sure there is nothing flammable nearby.
Always follow general safety
recommendations. Please note that conducting chemistry
experiments you must comply with the relevant legal procedures in
C18H38 →[KMnO4, T]→ RCHO + RCOOH
- Put the mixture of paraffin wax and potassium permanganate into a test-tube.
- Heat the test-tube with a burner. An exotermic reaction with flashes occurs.
Paraffin wax is a mixture of various hydrocarbons, primarily alkanes. Alkanes are not oxidized by potassium permanganate at room temperature, but can react under heating. The mixture of carbon acids and other organic compounds is formed in this case.
A violent exothermic reaction occurs in the mixture of paraffin wax and potassium permanganate. If you overheat the mixture, the products of pyrolysis ignite near the mouth of the test-tube.