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Question
What is the action of following reagents on ethanoic acid?
P2O5/heat
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Solution
Ethanoic acid on heating with strong dehydrating agent P2O5 forms acetic anhydride.
\[\begin{array}{cc}
\phantom{............}\ce{O}\phantom{........}\ce{O}\phantom{}\\
\phantom{............}||\phantom{........}||\phantom{}\\
\ce{\underset{\text{Ethanoic acid}}{2CH3COOH} ->[\ce{P2O5}/\Delta] \underset{\text{Acetic anhydride}}{CH3 _ C - O - C - CH3} + H2O}
\end{array}\]
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