Q36 of 60 Page 33

How is ethene prepared from ethanol? Give the reaction involved in it.

When ethanol is heated with excess of concentrated sulphuric acid (at 443 K); it produces ethene. This can be shown by following equation.


CH3CH2OH + hot conc. H2SO4 (at 443 K) → H2C = CH2 + H2O


Concentrated phosphoric (V) acid, H3PO4, can be used instead of concentrated sulphuric acid.


Hydrolysis of ethanol takes place in this reaction.


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