\n $\text{CH} \equiv \text{C}-\text{CH}_3$\n
+
\n $\text{H}_{2}\text{O}$\n
$\xrightarrow{\text{Hg}^{2+}, \text{H}^{+}}$\
\n $\underbrace{[\text{CH}_2 = \text{C(OH)}-\text{CH}_3]}_{\text{Неустойчивый енол}}$\n
$\rightarrow$\
\n $\underbrace{\text{CH}_3 - \text{C(O)} - \text{CH}_3}_{\text{Пропанон (Ацетон)}}$\n