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)

7-8%

Answer 2

Vinegar is 7-8% solution, of acetic acid. Acetic acid is commercially prepared from molasses (by product of sugar industry). ${{C}_{12}}{{H}_{22}}{{O}_{11}}+HOH\xrightarrow[(Invertase)]{yeast}\underset{glu\cos e}{\mathop{{{C}_{6}}{{H}_{12}}{{O}_{6}}}}\,+\underset{Fructose}{\mathop{{{C}_{6}}{{H}_{12}}{{O}_{6}}}}\,$ ${{C}_{6}}{{H}_{12}}{{O}_{6}}\xrightarrow[(Zymase)]{yeast}2{{C}_{2}}{{H}_{5}}OH+C{{O}_{2}}$ $\underset{(air)}{\mathop{{{C}_{2}}{{H}_{5}}OH}}\,+{{O}_{2}}\xrightarrow{acetobacter}C{{H}_{3}}COOH$