Question

write the mechanism of acid dehydration of ethanol to yield ethene.

Answer 1

Hey Friend,

*Process - 

Dehydration - it involves elimination of elements of water from alcohol. 

*Reaction -

C2H5OH -----> C2H4 + H2O

*Catalyst - [the catalysts act as dehydrating agents!]

concentrated H2SO4 at 170 degrees or Al2O3 at 350 degrees 

*Purification -

passage of ethene through NaOH solution removes CO2 and SO2 impurities formed by oxidation of the strong acid!

Hope it helps!