Question

What is the percentage of acetic acid present in vinegar?

• A. 6-10%
• B. 70-80%
• C. 7-8%
• D. 90-100%

Answer 1

Answer: (C)

Vinegar is 7-8% solution, of acetic acid. Acetic acid is commercially prepared from molasses (by product of sugar industry). $C_{12}{H}_{22}{O}_{11}+HOH\underset{(Invertase)}{\overset{yeast}{\to }}\underset{glu\cos e}{C_6{H}_{12}{O}_6}+\underset{Fructose}{C_6{H}_{12}{O}_6}$ $C_6{H}_{12}{O}_6\underset{(Zymase)}{\overset{yeast}{\to }}2C_2{H}_{5}OH+C{O}_2$ $\underset{(air)}{C_2{H}_{5}OH}+O_2\stackrel{acetobacter}{\to }C{H}_{3}COOH$