Answer by
tismeekat (7)
Acetic acid (also known as ethanoic acid) is a key ingredient in vinegar; it is responsible for its sour taste and pungent smell. The word acetic is derived from acetum, Latin for vinegar. Vinegar is an aqueous solution of acetic acid and results from the fermentation of alcohol dilutions. The acetic concentration in vinegar is typically around 5% (w/v).