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Acid  Compound that gives off H+ ions in solution.
| pH measures the acidity of a solution, the lower the pH, the more acid the solution. A pH of 7 corresponds to a neutral solution. | | pH | | | 0 | | | | hydrochloric acid, sulphuric acid | | 1 | stomach acid | | | | | 2 | battery acid | | | | | 3 | vinegar | | | lemon juice | | 4 | tomato juice | | | | | 5 | acid rain, black coffee | | | human skin | | 6 | | | | saliva, milk | | 7 | distilled water | |
See also: Acetic acid, Acetyl-Salicyclic Acid, Acidic, Acidic Solution, Acidulant, Alkaline, Aspartic Acid, Benzoic Acid, Brösted Acid, Buffer Solutions, Carbonic Acid, Carboxylic Acid, Conjugate Acid, Conjugate Base, Equivalence Point, Hydrochloric Acid, Hydrofluoric Acid, Nitric Acid, pH, pOH, Salts, Weak Acid.
  
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