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Ethanol - Dehydration.
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
ethene +
water
C2H5OH(l)
C2H4(g)
+ H2O(l)
Ethene can also be made by cracking hydrocarbons.
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