Concept:The esterification of a carboxylic acid with an alcohol requires an acid catalyst to proceed at a functional rate and to drive the equilibrium forward by sequestering the formed water.
Formula:$$ \text{Acid} + \text{Alcohol} \rightleftharpoons_2\text{SO}_4} \text{Ester} + \text{Water} $$
Solution:- Concentrated sulfuric acid (\( \text{H}_2\text{SO}_4 \)) acts as both a catalyst (providing protons) and a dehydrating agent.
- By absorbing \( \text{H}_2\text{O} \), it shifts the reaction equilibrium toward the right, maximizing ester yield.
Why other options are incorrect:Platinum (Pt) and Nickel (Ni) are hydrogenation/reduction catalysts. Pumice stone prevents bumping during boiling but possesses no catalytic properties for esterification.
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