# Why concentrated sulphuric acid is used as a catalyst instead of dilute sulphuric acid or a weak acid in esterification?

## This question is ask specifically after the realisation of esterification lab, Where: Methanol: CH3OH + Salicylic acid: OH(C6H4)COOH (I did not double check the formula) where mixed in order to form Methyl salicylate (C8H8O3) OH(C6H4)COO - CH3 + H2O. I used sulfuric acid as a catalyst.

carboxylic acid + alcohol $r i g h t \le f t h a r p \infty n s$ ester + water