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Reference Terms
from Wikipedia, the free encyclopedia

Acid

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).

Note:   The above text is excerpted from the Wikipedia article "Acid", which has been released under the GNU Free Documentation License.
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February 20, 2017

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updated 12:56 pm ET