Explain mechaniseem for acid catalyzed dehydration
of ethanol to ethene
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The mechanism of acid dehydration of ethanol to yield ethene involves the following three steps: ... Elimination of a proton to form ethene: The acid consumed in step 1 is released in Step 3. After the formation of ethene, it is removed to shift the equilibrium in a forward direction.
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This page looks at the mechanism for the acid catalysed dehydration of a simple primary alcohol like ethanol to give an alkene like ethene. Ethanol can be dehydrated to give ethene by heating it with an excess of concentrated sulphuric acid at about 170°C. Concentrated phosphoric(V) acid, H3PO4, can be used instead.
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