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Write the mechanism of hydration of ethe...

Write the mechanism of hydration of ethene to yield ethanol.

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Ethene does not react with water as such. Water being little polar, is not in a position to provide `H^(+)` ion for initial electrophilic attack on ethene. The reaction is carried in the presence of `H_(2)SO_(4)`. The acid provides proton `(H^(+))` for the initial electrophilic attack.

In the second step, `H_(2)O` attracks the carbocation in preference to `HSO_(4)^(-)` ion as a nucleophile
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