The hydration reaction of propyne also known as prop-1-yne or methylacetylene involves the addition of water HO across the triple bond of the alkyne to form an alcohol. The reaction mechanism proceeds through the following steps:1. Acid-catalyzed hydration: The reaction is typically carried out in the presence of an acid catalyst, such as sulfuric acid HSO or phosphoric acid HPO , which protonates the alkyne to form a resonance-stabilized carbocation.Propyne + H Resonance-stabilized carbocation2. Nucleophilic attack: The oxygen atom of a water molecule acts as a nucleophile and attacks the carbocation, forming a bond with the positively charged carbon atom.Resonance-stabilized carbocation + HO Oxonium ion intermediate3. Deprotonation: Another water molecule acts as a base and deprotonates the oxonium ion intermediate, resulting in the formation of an enol.Oxonium ion intermediate + HO Enol + HO4. Tautomerization: The enol undergoes keto-enol tautomerization, which is an equilibrium process that involves the migration of a hydrogen atom and a double bond. This results in the formation of a ketone as the major product.Enol KetoneSo, the overall reaction is:Propyne + HO in the presence of an acid catalyst 2-propanone acetone The product formed in the hydration reaction of propyne is 2-propanone, also known as acetone, which is a common solvent and the simplest ketone.