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Write the mechanism of hydration of ethene to yield ethanol.

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Three steps are involved in the mechanism of hydration of ethene to yield ethanol.
$(1)$ The electrophillic attack of hydronium ion protonates ethene to form carbocation.
$(2)$ Water (as a nucleophile) attacks carbocation.
$(3)$ Deprotonation gives ethanol.
The mechanism is shown above.

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