Preparation of alcohols from alkene by hydration

Alkenes undergo hydration (addition of water across C=C bond) in presence of dilute H₂SO₄ to produce alcohols.


In the case of unsymmetrical alkenes, addition of water to the double bond is in accordance with Markownikoff’s rule.


Industrially, the alkene obtained by cracking of hydrocarbons, is absorbed by passing it into sulphuric acid at k and atmospheric pressure. The acid is diluted and treated with steam to release the alcohol.