Question

what is the main difference between estrification & saponification

Answer 1

Esterification :

The reaction in which a carboxylic acid combines with an alcohol to form an ester is called esterification.Esters are formed.
Saponification :The alkaline hydrolysis of esters is known as saponification.Soap is formed.

Answer 2

esterification
when ethanol react with ethanoic acid in the presence of an acid ,forming a product called Easter
saponification
when Easter react with NaOH ,it forming a product which is used in forming the soap ,this is called saponification