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How is diethyl ether prepared in the lab...

How is diethyl ether prepared in the laboratory ? How will you distinguish it from ethanol and diphenyl ether. What happens when it is treated with hot HI ?

Text Solution

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Diethyl ether is prepared in the laboratory by the reaction of ethanol with conc. `H_(2)SO_(4)` at `140^(@)C`
`CH_(3)CH_(2)OH+"Conc."H_(2)SO_(4)toCH_(3)CH_(2)HSO_(4)+H_(2)O`
`CH_(3)CH_(2)HSO_(4)+CH_(3)CH_(2)OHoverset(140^(@)C)(to)CH_(3)CH_(2)OCH_(2)CH_(3)`
Diphenyl ether does not cleaved by HI which diethyl ether undergoes reaction with HI.
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