A chemical property of vinegar is its acidity.
Vinegard is a diluted acid. It is acetic acid in water.
Acetic acid is CH3 COOH.
The group COOH is the carboxylic group and is what tells you that a compound is an organic acid.
COOH disociates in water into COO- and H3O+.
CH3COOH + H2O ----> CH3COO(-) + H3O(+)
All the substances that dissociate in water producing hydronium groups (H3O+) are acids.
