The characterisation of ethylene
Article no. P7171000 | Type: Experiments
Ethanol can be catalytically dehydrated to ethylene. Apart from aluminium oxide, anhydrous aluminium sulphate or aluminium asbestos are also suitable. Potassium permanganate acts as an oxidizing agent in the presence of double bonds. The characteristic colour change from violet to brown results from the formation of manganese hydroxide:
3 C2H4 + 2 KMnO4 + 6 H2O → 3 HO-CH2-CH2-OH + 2 MnO(OH)2 + 2 KOH
The homologous series of the alkenes can be developed just as it was done for the alkanes. The similarities can be demonstrated by means of solubilities, combustibilities, reactivities etc. (e.g. compared to hexene).
- Ethylene can be prepared by the reduction of ethanol with aluminium oxide.
- Ethylene is an "unsaturated" and therefore relatively reactive hydrocarbon, which belongs to the group of olefins.
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