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Ethanol - Dehydration.

Why is Ethanol Dehydrated?

Ethanol can be dehydrated to make ethene.
This reaction is the reverse of the hydration of ethene.

Ethanol gas (vapour) is passed over a hot aluminium oxide catalyst.

ethanol      arrow      ethene   +    water
C2H5OH(l)   arrow      C2H4(g)  +    H2O(l)

 

Ethene can also be made by cracking hydrocarbons.

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