In the mechanism for the acid-catalyzed hydration of alkenes to form alcohols, what is the specific role of the hydronium ion () in the first elementary rate-determining step?

Question

In the mechanism for the acid-catalyzed hydration of alkenes to form alcohols, what is the specific role of the hydronium ion ($H_3O^+$) in the first elementary rate-determining step?

Prashant Kotian · Accepted Answer

Correct answer: B. In step 1 of acid-catalyzed hydration, the hydronium ion () provides an electrophilic proton. The pi electrons of the alkene attack this electrophile, resulting in the formation of a carbocation intermediate.

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