Question

Acetic acid and $P_2{O}_5$ reacts to produce which of the following?

• A. Acetic anhydride
• B. Acetaldehyde
• C. Phosphoric acid
• D. Acetone

Answer 1

Answer: (A)

Acetic acid on dehydration produce acetic anhydride. ${\text{P}}_{\text{2}}{\text{O}}_{\text{5}}$ is a dehydrating agent it dehydrate $\text{C}{\text{H}}_{3}COOH$ to anhydride $\underset{\text{Acetic}\text{acid}}{2C{H}_{3}COOH}\underset{(-H_{2}O)}{\overset{P_2{O}_5}{\to }}\underset{\text{Acetic}\text{anhydride}}{{(C{H}_{3}CO)}_{2}O}$