PHOSPHORIC ACID

any one of three chemical compounds made up of phosphorus, oxygen, and hydrogen (see acids and bases). The most common, orthophosphoric acid, H3PO4, is usually simply called phosphoric acid. Two molecules of it are formed by adding three molecules of water, H2O, to one molecule of phosphorus pentoxide (phosphoric anhydride, P2O5). It occurs as rhombic crystals or as a viscous liquid; both are deliquescent. The crystals melt at about 42 degrees Celsius. It has specific gravity 1.834 at 18 degrees Celsius, is soluble in alcohol, and is very soluble in water. It is a tribasic acid and forms orthophosphate salts with either one, two, or all three of the hydrogens replaced by some other positive ion. When it is heated to about 225 degrees Celsius, it dehydrates to form pyrophosphoric acid, H4P2O7; at still higher temperatures metaphosphoric acid, HPO3, is formed. Salts of pyrophosphoric acid are pyrophosphates; salts of metaphosphoric acid are metaphosphates. Phosphoric acid is prepared commercially by heating calcium phosphate rock with sulfuric acid; purer grades may be prepared by treating red phosphorus with nitric acid. It is used in pickling and rust-proofing metals, in acidifying jellies and beverages, and in preparing phosphate salts.

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The Columbia Encyclopedia, Sixth Edition Copyright© 2004, Columbia University Press. Licensed from Lernout & Hauspie Speech Products N.V. All rights reserved.

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Questia Books and Articles on: Phosphoric Acid
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books on: Phosphoric Acid  - 386 results

       More book Results: 1-10 11-20 21-30 31-40 41-50 >>  
 
1.
Salts, Acids, and Bases: Electrolytes: Stereochemistry
Book by Paul Walden, Ludwig Frederick Audrieth; McGraw-Hill Book Company, Inc., 1929
Subjects: Acids, Bases (Chemistry), Electrolytes, Salts, Stereochemistry
...and as bases towards acids. 1 A new idea, one...in the behavior of phosphoric acid. Berzelius gives the following formulas: Phosphoric acid = PO 5 Sodium...three modifications of phosphoric acid correspond to three...that in each of the acids the hydrogen atoms...
2.
Manometric Techniques: A Manual Describing Methods Applicable to the Study of Tissue Metabolism
Book by W. W. Umbreit, R. H. Burris, J. F. Stauffer; Burgess Pub. Co., 1957
Subjects: Tissue Metabolism
...extracted directly with ether. The succinic acid so extracted is then estimated as outlined...uptake is converted into mg. of fumaric acid as follows: Specificity: Malic, tartaric...aspartic, glutamic, citric and aconitic acids do not form succinic acid under the conditions of this method...
3.
Classics of Biology
Book by August Pi Suñer, Charles M. Stern; Philosophical Library, 1955
Subjects: Biology
...synthetized to adenylpyrophosphoric acid. It is therefore necessary that...down of adenylpyrophosphoric acid into adenylic and phosphoric acids. Only then will it be possible...so that the adenylpyrophosphoric acid previously
4.
General Cytology: A Textbook of Cellular Structure and Function for Students of Biology and Medicine
Book by Robert Chambers, Warren H. Lewis, Edwin G. Conklin, Frank R. Lillie, Merle H. Jacobs, Clarence E. McClung, Ernest E. Just, Albert P. Mathews, Margaret R. Lewis, Thomas H. Morgan, Edmund B. Wilson, Edmund V. Cowdry, Ralph S. Lillie; University of Chicago Press, 1924
Subjects: Cells
...carbohydrate, base, and phosphoric acid groups to which...complex nucleic acids found in animal...yeast nucleic acid, however, it...is through the phosphoric acids, which thus form...polymerized meta-phosphoric acid; on the other...
5.
Unity and Diversity in Biochemistry: An Introduction to Chemical Biology
Book by Marcel Florkin, T. Wood; Pergamon Press, 1960
Subjects: Biochemistry
present in orthophosphoric acid alone, so that these substances are stronger acids than phosphoric acid itself. When phosphoric acid is liberated from these esters and regains its three acid groups there is no appreciable change in the reaction...
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journal articles on: Phosphoric Acid  - 81 results

       More journal Results: 1-10 11-20 21-30 31-40 41-50 >>  
 
1.
The Atg12-conjugating Enzyme Atg10 Is Essential for Autophagic Vesicle Formation in Arabidopsis Thaliana
Journal article by Allison R. Phillips, Anongpat Suttangkakul, Richard D. Vierstra; Genetics, Vol. 178, 2008
Subjects: ATG10 protein, Arabidopsis thaliana, ATG12 protein, Arabidopsis, Amino acids, Apoptosis, Arabidopsis Proteins, Atg5 protein, Arabidopsis, Carbon, Enzymes, Genetics, Kinases, Mutant Proteins, Nitrogen, Phosphoric Monoester Hydrolases, Proteins, RNA, Plant, Scholarships & fellowships
...sequences to those available for cDNAs. Amino acid sequence comparisons were performed using...mm 2-(N-morpholino)ethanesulfonic acid (pH 5.7). After various amounts of...lactophenol blue solution 10 ml lactic acid, 10 ml glycerol, 10 ml liquid phenol...
2.
Multiple Endonucleases Function to Repair Covalent Topoisomerase I Complexes in Saccharomyces Cerevisiae
Journal article by Changchun Deng, James A. Brown, Dongqing You, J. Martin Brown; Genetics, Vol. 170, 2005
Subjects: Camptothecin, DNA Adducts, DNA Topoisomerases, Type I, DNA-Binding Proteins, Data analysis, Deoxyribonucleic acid--DNA, Endodeoxyribonucleases, Endonucleases, Enzymes, Exodeoxyribonucleases, Genes, Genetics, MRE11 protein, S cerevisiae, MUS81 protein, S cerevisiae, Mutation, Phosphoric Diester Hydrolases, RAD1 protein, S cerevisiae, SAE2 protein, S cerevisiae, SLX4 protein, S cerevisiae, Saccharomyces cerevisiae Proteins, Tdp1 protein, S cerevisiae, Ultraviolet radiation
3.
Svf1 Regulates Cell Survival by Affecting Sphingolipid Metabolism in Saccharomyces Cerevisiae
Journal article by Jennifer L. Brace, Robert L. Lester, Robert C. Dickson, Charles M. Rudin; Genetics, Vol. 175, 2007
Subjects: Apoptosis, Cells, Kinases, LCB3 protein, S cerevisiae, Microbiology, Mixed Function Oxygenases, Phosphoric Monoester Hydrolases, Proteins, SUR2 protein, S cerevisiae, Saccharomyces cerevisiae Proteins, Sphingosine, Svf1 protein, S cerevisiae
...media containing 1 mg/ml 5-fluroorotic acid (FOA). Kanamycin selection was performed...equal volume of ethanol. Trichloroacetic acid (TCA) was added to the cells (10 OD600...generated in strains auxotrophic for some amino acids are lethal (KIM et al. 2000; ZHANG et...
4.
Taste-aroma Interactions in a Ternary System: a Model of Fruitiness Perception in Sucrose/acid Solutions
Journal article by Johann C. Pfeiffer, Joanne Hort, Tracey A. Hollowood, Andrew J. Taylor; Perception and Psychophysics, Vol. 68, 2006
Subjects: Experimental psychology, Psychological aspects, Sensory perception, Smell, Sugar, Taste
...concentration of phosphoric acid than for the other acids. Thus, perhaps...between sucrose and phosphoric acid or a different...specific to strong acids (DeSimone, Lyall...and secondary acids). However, phosphoric acid is only found...
5.
Aberrant Synthesis of Indole-3-acetic Acid in Saccharomyces Cerevisiae Triggers Morphogenic Transition, a Virulence Trait of Pathogenic Fungi
Journal article by Reeta Prusty Rao, Ally Hunter, Olga Kashpur, Jennifer Normanly; Genetics, Vol. 185, 2010
Subjects: Bacteria, Drug resistance, Gram-positive bacteria, Mass spectrometry, Metabolites, Microbiology, Pathogenesis, Proteins, Studies, Yeast
...Synthesis of Indole-3-acetic Acid in Saccharomyces Cerevisiae...THE auxin indole-3-acetic acid (IAA) is best known for its...supplemented with auxotrophic amino acids (Guthrie and Fink 1991...methanol that was 5% acetic acid. Dried samples were resuspended...between 3 and 3.5) of 0.25% phosphoric acid and 0.1 m succinic acid...
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magazine articles on: Phosphoric Acid  - 58 results

       More magazine Results: 1-10 11-20 21-30 31-40 41-50 >>  
 
1.
The Greens Party
Magazine article by Bonnie Liebman; Nutrition Action Healthletter, Vol. 34, July 2007
Subjects: Bone diseases--Prevention, Bones--Care and treatment, Brain diseases--Prevention, Brain--Care and treatment, Eye diseases--Prevention, Eye--Care and treatment, Folic acid--Nutritional aspects, Folic acid--Physiological aspects, Greens, Edible--Nutritional aspects, Iron (Nutrient)--Physiological aspects, Iron in the body--Physiological aspects, Leafy vegetables--Nutritional aspects, Magnesium (Nutrient)--Physiological aspects, Magnesium in the body--Physiological aspects, Phytochemicals--Nutritional aspects, Phytochemicals--Physiological aspects, Potassium (Nutrient)--Physiological aspects, Potassium in the body--Physiological aspects, Vitamin A--Nutritional aspects, Vitamin A--Physiological aspects, Vitamin C--Nutritional aspects, Vitamin C--Physiological aspects, Vitamin K--Nutritional aspects, Vitamin K--Physiological aspects, Xanthophyll--Nutritional aspects, Xanthophyll--Physiological aspects
...minerals in produce neutralize acid-forming foods in the body. "We get acids from the metabolism of foods...and food additives like phosphoric acid in colas," says Tufts Tucker...isnt whether a food contains acid, but whether it makes the...
2.
Healthy Bodies, Healthy Minds
Magazine article by Nancy Salvato; World and I, Vol. 21, October 2006
...magnesium. High levels of phosphoric acid may combine with calcium...schools.pdf (46) Phosphoric Acid http://www.answers.com/topic/phosphoric-acid (4) Potato Chips...shtml (27) Trans Fatty Acids http://www.recoverymedicine...
3.
Fuel Cell Update
Magazine article; Popular Science, Vol. 242, June 1993
Subjects: Alternative energy sources, Batteries, Fuel cells, R&D, Research & development
...alphabet soup of urban smog and acid rain. And because fuel cells...development track records are phosphoric acid and solid polymer fuel...the Los Angeles area, is a phosphoric acid model, PAFC for short...portable 24-volt, 250-watt phosphoric acid fuel cell for powering...
4.
Tapping Energy from Solar Hydrogen
Magazine article by Roy Mcalister; World and I, Vol. 14, February 1999
Subjects: Hydrogen--Production management, Solar energy--Production management
...noted that when iron reacts with sulfuric acid, "an air arises which bursts forth like...exchange membrane; alkaline; phosphoric acid; molten carbonate; and solid oxide membrane...depending upon the output. Phosphoric acid.Operating at a temperature of about 400...
5.
Soft Drinks Linked to Osteoporosis
Magazine article; Nutrition Health Review, 2006
Subjects: Bone density, Bones, Men, Older people, Osteoporosis
...University have suggested that the phosphoric acid in cola drinks might be the culprit...carbonated beverages. It appears that phosphoric acid in cola beverages has a...into the body. She added that phosphoric acid might also adversely affect...
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newspaper articles on: Phosphoric Acid  - 75 results

       More newspaper Results: 1-10 11-20 21-30 31-40 41-50 >>  
 
1.
'Healthy' Pepsi That Will Strike a Raw Nerve with Rivals
Newspaper article; The Daily Mail (London, England), February 11, 2008
Subjects: Carbonated beverages, Coca-Cola Co. (Atlanta, Georgia), Phosphoric acid, Soft drink industry, Soft drinks
...fructose corn syrup, sugar, artificial colourings,phosphoric acid, caffeine, citric acid and natural flavours. In comparison, Pepsi Raw...plain caramel colouring, coffee leaf, tantaric acid from grapes, gum arabicfrom acacia trees, cane...
2.
Carbonated Beverages and Low Bone Density
Newspaper article by By Celeste Robb-Nicholson; Daily Herald (Arlington Heights, IL), March 22, 2010
Subjects: Bone density, Bones--Density, Bottled water industry, Carbonated beverages, Fractures, Fractures (Injuries), Phosphates, Phosphoric acid, Soft drinks
...Warnings about the harmful effects of carbonated beverages on bone emerge from time to time. The theory is that the phosphoric acid (phosphate) used to enhance flavor in some carbonated beverages can interfere with calcium absorption and result...
3.
Two Die as Acid Spill Closes M6
Newspaper article; The Birmingham Post (England), September 11, 2004
Two Die as Acid Spill Closes M6. Byline: Campbell Docherty...injured after a chemical tanker carrying acid crashed on the M6, leading to rush hour...Hospital. The tanker shed its load of phosphoric acid, used in the manufacture of fertilisers...
4.
Truth about McCririck's Diet Cola Addiction; Celebrity Big Brother Housemate John McCririck Loves Diet Coke. but Is It Really Good for Him? Anastasia Stephens Looks at Its Contents HEALTH & FITNESS
Newspaper article; The Evening Standard (London, England), January 18, 2005
...colas contain 27-39mg of phosphoric acid per 100ml. One study...that these drinks contain phosphoric acid without any calcium...balanced. If you take in phosphoric acid alone, the extra phosphorus...from being absorbed." OTHER ACIDS FIZZY drinks contain other...
5.
What's Lurking in Your Child's Fizzy Drinks? after Cancer-Causing Benzene Is Found in Favourite Brands
Newspaper article; The Daily Mail (London, England), April 11, 2006
...sweeteners: No; Other additives: Phosphoric and citric acid, colour...sugar for an adult. Contains phosphoric acid, which allows more carbon...flavourings, caffeine, phosphoric and citric acids, preservative (sodium benzoate...
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encyclopedia articles on: Phosphoric Acid  - 18 results

       More encyclopedia Results: 1-10 11-18 >>  
 
1.
Phosphoric Acid
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2009
PHOSPHORIC ACID any one of three...and hydrogen (see acids and bases ). The...orthophosphoric acid, H 3 PO 4 , is usually simply called phosphoric acid. Two molecules...phosphorus pentoxide (phosphoric anhydride, P 2 O...
2.
Acids and Bases
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2009
...hydrogen cyanide , salicylic acid, lactic acid , and tartaric acid . Some examples of organic bases are: pyridine...ethylamine. Some of the common inorganic acids are: hydrogen sulfide , phosphoric acid , hydrogen chloride , and sulfuric acid...
3.
Acid Anhydride
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2009
...to form an acid (see acids and bases ). Anhydrides of inorganic acids are usually oxides of...anhydride of carbonic acid, H 2 CO 3 . Nitrogen...is the anhydride of phosphoric acid, H 3 PO 4 . Sulfur...anhydride of sulfuric acid, H 2 SO 4 . Anhydrides of organic acids, like the acids themselves...
4.
Phosphorus
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2009
...prepared it from urine. Phosphoric acid was discovered in 1770 by...ash (1774) and produced phosphoric acid by the action of nitric...oxides; there are several acids other than the orthophosphoric acid noted above. Phosphorus...
5.
Phosphate
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2009
PHOSPHATE salt or ester of phosphoric acid , H 3 PO 4 . Because phosphoric acid is tribasic (having three replaceable hydrogen atoms), it forms monophosphate, diphosphate, and triphosphate salts in which one, two, or three of the hydrogens...
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