An acid (often represented by the generic formula HA) is traditionally considered any chemical compound that, when dissolved in water, gives a solution with a pH of less than 7.0.
That approximates the modern definition of Brønsted and Lowry, who defined an acid as a compound which donates a hydrogen ion (H+) to another compound (called a base).
Common examples include acetic acid (in vinegar) and sulfuric acid (used in car batteries).
For more information about the topic Acid, read the full article at Wikipedia.org, or see the following related articles:
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