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Why does acetic acid give vinegar its sharp taste?
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organic compound
The structures of organic compounds can be depicted in condensed, expanded, and three-dimensional structural formulas.
The sharp, sour taste of vinegar is primarily attributed to acetic acid, which typically makes up about 4 to 5 percent of the liquid by volume.12
While the sour taste sensation in humans is generally produced by hydrogen ions found in acids, acetic acid is a weak organic acid that tastes more sour than its hydrogen ion concentration alone would suggest. This occurs because the rest of the acid molecule influences the efficiency with which those hydrogen ions stimulate the taste receptors. Additionally, other organic acids and esters derived from the source material used to produce the vinegar contribute to its specific flavor and aroma profile.32