Acid
hideAn acid (from the Latin acidus meaning sour) is traditionally considered any chemical compound that, when dissolved in water, gives a solution with a hydrogen ion activity greater than in pure water, i.e. a pH less than 7.0. That approximates the modern definition of Johannes Nicolaus Brønsted and Martin Lowry, who independently 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). Acid/base systems are different from redox reactions in that there is no change in oxidation state. Acids can occur in solid, liquid or gaseous form, depending on the temperature. They can exist as pure substances or in solution.
Chemicals or substances having the property of an acid are said to be acidic (adjective).
For more information about Acid, read the full article at
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News tagged with acid
Adjusting acidity with impunity
Chemistry / Analytical Chemistry
Dec 22, 2009 |
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(PhysOrg.com) -- How do individual cells or proteins react to changing pH levels? Researchers at the MESA+ Institute for Nanotechnology at the University of Twente, The Netherlands, have developed a technique ...
Study finds new relationship between gene duplication and alternative splicing in plants
Dec 07, 2009 |
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University of Georgia scientists looking to understand the genetic mechanisms of plant defense and growth have found for the first time in plants an inverse relationship between gene duplication and alternative ...
With amino acid diet, mice improve after brain injury
Dec 07, 2009 |
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Neurology researchers have shown that feeding amino acids to brain-injured animals restores their cognitive abilities and may set the stage for the first effective treatment for cognitive impairments suffered by people with ...
Muscle cell infusion shown to strengthen sphincters in animals
Dec 04, 2009 |
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A new study shows that muscle cells grown in the lab can restore an intestine's ability to squeeze shut properly. The work, performed in dogs and rats, might ultimately help treat patients with conditions such as gastric ...
Added sugar in raisin cereals increases acidity of dental plaque
Dec 18, 2009 |
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Elevated dental plaque acid is a risk factor that contributes to cavities in children. But eating bran flakes with raisins containing no added sugar does not promote more acid in dental plaque than bran flakes alone, according ...
New research may help to clean drainage from abandoned mines
Dec 16, 2009 |
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(PhysOrg.com) -- In a quiet green glen near Ashville, Pa., lies a rust-colored pond. A deep, rectangular hole in the ground, it somewhat resembles an Olympic-sized pool. Few people, however, would make the ...
Targeting brain cancer cell metabolism may provide new treatment
Dec 15, 2009 |
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Inhibiting fatty acid synthesis in brain cancer cells may offer a new option to treat about 50 percent of deadly glioblastomas that are driven by amplified signaling of the epidermal growth factor receptor (EGFR), according ...
