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Write the mechanisms of the following reactions: (i) Hydration of ethene to ethanol (ii) Dehydration of ethanol, giving ethene.

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Write the mechanisms of the following reactions:
(i) Hydration of ethene to ethanol
(ii) Dehydration of ethanol, giving ethene.
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(i) Mechanism of hydration of ethene to ethanol
Step-I: Protonation of alkene

Step-II: Nucleophilic attack of water as carbocation

Step-III: Deprotonation of alcohol

(ii) Mechanism of dehydration of ethanol to ethene.
Step-I: Formation of protonated alcohol

Step–II: Formation of carbocation

Setp-III. Formation of ethene

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