Question

What is the suitable temperature to heat p2o5 with acetic acid to obtain acetic anhydride?

Answer 1

Answer:

,On heating Acetic acid with \mathrm{P}_{2} \mathrm{O}_{5}, it will form ethanoic anhydride.

Acetic acid is the common name of ethanoic acid. The chemical formula of it is \mathrm{CH}_{3}-\mathrm{COOH}. It is a carboxylic acid with two C atoms. \mathrm{P}_{2} \mathrm{O}_{5} is phosphorus pentaoxide that is a very good dehydrating agent and involves in dehydration reactions of carboxylic acids mainly.

Here when acetic acid is heated with \mathrm{P}_{2} \mathrm{O}_{5}, it will form ethanoic anhydride.

\bold{2 \mathrm{CH} 3 \mathrm{COOH}+\mathrm{P}_{2} \mathrm{O}_{5} \rightarrow \mathrm{CH}_{3}-\mathrm{CO}-\mathrm{O}-\mathrm{CO}-\mathrm{CH}_{3}+\mathrm{H}_{2} \mathrm{O}}

One water molecule comes out during the reaction of combination of two molecules.