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Discuss the acidic dehydration of alcoho...

Discuss the acidic dehydration of alcohols at different temperatures.

Text Solution

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When alcohol are heated with the protonic acid such as cone `H_2SO_4` or `H_3PO_4` at 443 K, they get dehydration to form alkenes. For example:

The relative case of dehydration of alcohols follows the order :
`1^@` alcohol `lt2^@` alcohol `lt3^@` alcohol
(b) When excess of an alcohol is heated with on `H_2SO_4` So, at 413 K ,ether is the main product for example.
`CH_3CH_2Ounderset("ethanol")(H)+HO" "CH_2-CH_3overset(H_2SO_4//413K)rarrunderset("Diethylether")(CH_3CH_2OCH_2CH_3+H_2O)`
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Knowledge Check

  • Dehydration of alcohols to ethers is catalysed by

    A
    Hot NaOH
    B
    Conc. `H_2SO_4` at 413 K
    C
    Hot `CH_3COOH`
    D
    Hot `HNO_3`

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