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
Wikipedia.
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News tagged with acid
Scientists Reproduce a Building Block of Life in Laboratory
Nov 06, 2009 |
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(PhysOrg.com) -- NASA scientists studying the origin of life have reproduced uracil, a key component of our hereditary material, in the laboratory.
Previously Unknown Volcanic Eruption Helped Trigger Cold Decade
Space & Earth / Earth Sciences
Oct 29, 2009 |
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(PhysOrg.com) -- A team of chemists from the U.S. and France has found compelling evidence of a previously undocumented large volcanic eruption that occurred exactly 200 years ago, in 1809.
Scientists reveal secrets of drought resistance
Oct 22, 2009 |
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A team of biologists in California led by researchers at The Scripps Research Institute and the University of California, San Diego has solved the structure of a critical molecule that helps plants survive during droughts. ...
Ice cream may target the brain before your hips, study suggests
Sep 14, 2009 |
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Blame your brain for sabotaging your efforts to get back on track after splurging on an extra scoop of ice cream or that second burger during Friday night's football game.
Scientists discover potential new drug delivery system
Aug 25, 2009 |
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(PhysOrg.com) -- Scientists at UC Santa Barbara have discovered a potential new drug delivery system. The finding is a biological mechanism for delivery of nanoparticles into tissue. The results are published ...
Ancient volcano may have caused mass extinction
Space & Earth / Earth Sciences
May 28, 2009 |
4.3 / 5 (18) |
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A previously unknown giant volcanic eruption that led to global mass extinction 260million years ago has been uncovered by scientists at the University of Leeds.
Geographic isolation drives the evolution of a hot springs microbe
May 27, 2009 |
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Sulfolobus islandicus, a microbe that can live in boiling acid, is offering up its secrets to researchers hardy enough to capture it from the volcanic hot springs where it thrives. In a new study, researchers report that p ...
One Sponge-Like Material, Three Different Applications
May 26, 2009 |
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(PhysOrg.com) -- A new sponge-like material that is black, brittle and freeze-dried (just like the ice cream astronauts eat) can pull off some pretty impressive feats. Designed by Northwestern University chemists, it can ...
Fish oil protects against diseases like Parkinson's, study
Apr 19, 2009 |
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Dr. Nicolas Bazan, Director of the Neuroscience Center of Excellence, Boyd Professor, and Ernest C. and Yvette C. Villere Chair of Retinal Degenerative Diseases Research at LSU Health Sciences Center New Orleans, will present ...
Researchers unravel role of priming in plant immunity
Apr 02, 2009 |
5 / 5 (1) |
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Scientists have discovered a naturally occurring compound that triggers a plant's immune system, thereby protecting the plant from a secondary bacterial infection.
Research links evolution of fins and limbs with that of gills
Mar 23, 2009 |
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The genetic toolkit that animals use to build fins and limbs is the same genetic toolkit that controls the development of part of the gill skeleton in sharks, according to research to be published in Proceedings of ...
Well-known enzyme is unexpected contributor to brain growth
Medicine & Health / Neuroscience
Mar 12, 2009 |
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An enzyme researchers have studied for years because of its potential connections to cancer, diabetes, heart disease, hypertension and stroke, appears to have yet another major role to play: helping create and maintain the ...
Housewife Remedy for Scurvy Preceded Medical Discovery
Mar 11, 2009 |
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(PhysOrg.com) -- A 100-page handwritten book by Mrs. Ebot Mitchell written in 1707 on household remedies contains among other things a recipe to treat scurvy. The recipe containing extracts from plants, orange ...
Billions of years ago, microbes were key in developing modern nitrogen cycle
Biology /
Feb 19, 2009 |
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(PhysOrg.com) -- As the world marks the 200th anniversary of Charles Darwin's birth, there is much focus on evolution in animals and plants. But new research shows that for the countless billions of tiniest creatures - microbes ...
Rsearchers discover brain's memory 'buffer' in single cells
Jan 25, 2009 |
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Individual nerve cells in the front part of the brain can hold traces of memories on their own for as long as a minute and possibly longer, researchers at UT Southwestern Medical Center have found.
