Question

phthalic acid undergo ___ during preparation of phthalic anhydride​

Answer 1

Answer:

Phthalic anhydride is the organic compound with the formula C6H4(CO)2O. It is the anhydride of phthalic acid. Phthalic anhydride is a principal commercial form of phthalic acid. It was the first anhydride of a dicarboxylic acid to be used commercially. This white solid is an important industrial chemical, especially for the large-scale production of plasticizers for plastics. In 2000, the worldwide production volume was estimated to be about 3 million tonnes per year.

Answer 2

Answer:

Phthalic acid undergo dehydration during preparation of Phthalic anhydride​.

Explanation:

Phthalic acid:

• Phthalic acid is an aromatic compound.
• It has a formula of  C₆H₄(CO₂H)₂.
• Phthalic acid was first obtained by French chemist Auguste Laurent in 1836 by oxidizing naphthalene tetrachloride.

Phthalic anhidride:

• Phthalic anhydride is an organic compound.
• It has a formula of  C₆H₄(CO₂)O.
• It is an anhydride of Phthalic acid.
• Phthalic anhydride was first reported in 1836 by Auguste Laurent.

Reaction:

When Phthalic acid is heated then it undergoes dehyradation to form Phthalic anhydride.

C₆H₄(CO₂H)₂ upon heating gives  C₆H₄(CO₂)O.

#SPJ3