# What is the major product obtained from the acid-catalyzed hydration of CH_3CH_2CH_2CH=CH_2?

The ${\text{H}}^{+}$ from the acid adds to $\text{C-1}$ of the alkene and forms a 2° carbocation at $\text{C-2}$.
The $\text{O}$ atom of the water then attacks $\text{C-2}$ to form pentan-2-ol.