Write the mechanism of hydration of ethene to yield ethanol.

Explanation

### Step-by-Step Solution for the Mechanism of Hydration of Ethene to Yield Ethanol

1. **Starting Material**: The reaction begins with ethene (C₂H₄), which has a double bond between the two carbon atoms.

2. **Protonation of Ethene**: In the presence of an acid (H⁺), the double bond of ethene acts as a nucleophile and attacks the electrophilic hydrogen ion (H⁺). This step results in the formation of a carbocation. Since ethene is symmetrical, it does not matter which carbon the hydrogen attaches to; both lead to the same carbocation structure:
\[ \text{C}_2\text{H}_4 + \text{H}^+ \rightarrow \text{C}_2\text{H}_5^+ \]
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