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