Write the structural formula of ethanol. What happens when it is heated with excess of conc. H 2 SO 4 at 443 K? Write the chemical equation for the reaction stating the role of conc. H 2 SO 4 in this reaction.



Structure of ethanol:  

Structure of Ethanol - Teachoo.png


When ethanol is heated with conc H 2 SO 4

  • a dehydration reaction takes place i.e. a water molecule is removed. 
  • As a result, ethene is formed

The reaction that takes place is:

Reaction of Ethanol with conc H2SO4 - Teachoo.png


Here, H 2 SO 4 acts as a dehydrating agent and removes a water molecule from ethanol.

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CA Maninder Singh is a Chartered Accountant for the past 14 years and a teacher from the past 18 years. He teaches Science, Economics, Accounting and English at Teachoo