Answer 1

The mechanism of hydration of ethene to form ethanol involves three steps.

Step 1:

Protonation of ethene to form carbocation by electrophilic attack of H₃O⁺:

`H_2O + H^(+) -> H_3O^(+)`

Step 2:

Nucleophilic attack of water on carbocation:

Step 3:

Deprotonation to form ethanol: