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
Strange molecule in the sky cleans acid rain, scientists discover
Aug 12, 2008 |
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Researchers have discovered an unusual molecule that is essential to the atmosphere's ability to break down pollutants, especially the compounds that cause acid rain. It's the unusual chemistry facilitated ...
Congress considers major global warming measure
Apr 19, 2009 |
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(AP) -- The last time Congress passed major environmental laws, acid rain was destroying lakes and forests, polluted rivers were on fire and smog was choking people in some cities.
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.
Climate Change, Acid Rain Could Be Good for Forests
Oct 20, 2008 |
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(PhysOrg.com) -- After more than 20 years of research in the northern hardwood forests of Michigan, scientists at Michigan Technological University's School of Forest Resources and Environmental Science have reached a surprising ...
Chemists see first building blocks to life on Earth
May 13, 2009 |
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Scientists at The University of Manchester have developed an experiment that sheds new and fascinating light on how life on Earth might have begun.
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.
Existing anti-obesity drugs may be effective against flu, hepatitis and HIV
Biology /
Sep 28, 2008 |
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Viruses dramatically increase cellular metabolism, and existing anti-obesity drugs may represent a new way to block these metabolic changes and inhibit viral infection, according to a study published today in the journal ...
Brain compound 'throws gasoline onto the fire' of schizophrenia
Nov 18, 2008 |
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New research has traced elevated levels of a specific compound in the brain to problem-solving deficits in patients with schizophrenia.
Hope for Alzheimer’s patients? Dipeptide blocks the formation of toxic amyloid β-peptide aggregates in mice
Dec 04, 2008 |
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(PhysOrg.com) -- Alzheimer's disease is the primary cause of age-related dementia. About 15 million people are affected by this neurodegenerative disease worldwide. It has so far not been possible to combat the causes of ...
Hairspray is linked to common genital birth defect, says study
Nov 21, 2008 |
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Women who are exposed to hairspray in the workplace during pregnancy have more than double the risk of having a son with the genital birth defect hypospadias, according to a new study published today in the ...
Ancient volcano may have caused mass extinction
Space & Earth / Earth Sciences
May 28, 2009 |
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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.
Simple genetic mechanism may be behind the origin of species
Biology /
Jan 30, 2009 |
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(PhysOrg.com) -- Some of the secrets behind the emergence of new species have been uncovered in a genetic study, conducted in collaboration with bioscientists at The University of Nottingham.
Scientists identify role of fatty acids in Alzheimer's disease
Oct 19, 2008 |
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Scientists at the Gladstone Institute of Neurological Disease (GIND) and the University of California have found that complete or partial removal of an enzyme that regulates fatty acid levels improves cognitive deficits in ...
Jellyfish protein helps regrow joint cartilage
Feb 07, 2009 |
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Mucin, a protein extracted from Nomura's jellyfish, has proved highly effective in regrowing cartilage in joints, scientists in Japan claim.
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.
