Question

state the role of concentrated sulphuric acid in esterification

Answer 1

The role of the concentrated sulphuric acid is as a dehydrating agent to remove water from the ethanol.

Answer 2

Esterification is a relatively slow process at room temperature and does not proceed to completion. Concentrated sulfuric acid is used as a catalyst, and has a dual role: Speeds up the reaction. Acts as a dehydrating agent, forcing the equilibrium to the right and resulting in a greater yield of ester.