Any acidic compound made of phosphorous, oxygen, and hydrogen
Not to be confused with Phosphorous acid.
In chemistry, phosphorus oxoacid (or phosphorus acid) is a generic name for any acid whose molecule consists of atoms of phosphorus, oxygen, and hydrogen.[1] There is a potentially infinite number of such compounds. Some of them are unstable and have not been isolated, but the derived anions and organic groups are present in stable salts and esters. The most important ones—in biology, geology, industry, and chemical research—are the phosphoric acids, whose esters and salts are the phosphates.
In general, any hydrogen atom bonded to an oxygen atom is acidic, meaning that the –OH group can lose a proton H+ leaving a negatively charged –O− group and thus turning the acid into a phosphorus oxoanion. Each additional proton lost has an associated acid dissociation constant Ka1, Ka2 Ka3, ..., often expressed by its cologarithm (pKa1, pKa2, pKa3, ...). Hydrogen atoms bonded directly to phosphorus are generally not acidic.
^Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. ISBN 978-0-08-037941-8.
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In chemistry, phosphorusoxoacid (or phosphorus acid) is a generic name for any acid whose molecule consists of atoms of phosphorus, oxygen, and hydrogen...
that are bonded directly to phosphorus and some contain phosphorus–phosphorus bonds. Although many oxoacids of phosphorus are formed, only nine are commercially...
chemistry, a phosphoric acid, in the general sense, is a phosphorusoxoacid in which each phosphorus (P) atom is in the oxidation state +5, and is bonded...
monophosphoric acid or phosphoric(V) acid) is a colorless, odorless phosphorus-containing solid, and inorganic compound with the chemical formula H3PO4...
find no echo with phosphorus, arsenic, antimony, or bismuth. By the same token, however, the complexity of the phosphorusoxoacids finds no echo with...
formula. Phosphorous acid is an intermediate in the preparation of other phosphorus compounds. Organic derivatives of phosphorous acid, compounds with the...
Triphosphoric acid (also tripolyphosphoric acid), with formula H5P3O10, is a condensed form of phosphoric acid. In the family of phosphoric acids, it is...
phosphorus in a formal oxidation state of +4. In the solid state it is present as the dihydrate, H4P2O6·2H2O. In hypophosphoric acid the phosphorus atoms...
Pyrophosphoric acid, also known as diphosphoric acid, is the inorganic compound with the formula H4P2O7 or, more descriptively, [(HO)2P(O)]2O. Colorless...
An oxyacid, oxoacid, or ternary acid is an acid that contains oxygen. Specifically, it is a compound that contains hydrogen, oxygen, and at least one...
Hypophosphorous acid (HPA), or phosphinic acid, is a phosphorus oxyacid and a powerful reducing agent with molecular formula H3PO2. It is a colorless low-melting...
In organic chemistry, chiral phosphoric acids are esters of phosphoric acid H3PO4 that have chiral backbones. Well known examples include cyclic diesters...
Peroxydiphosphoric acid (H4P2O8) is an oxyacid of phosphorus. Its salts are known as peroxydiphosphates. It is one of two peroxyphosphoric acids, along...
Peroxymonophosphoric acid (H3PO5) is an oxyacid of phosphorus. It is a colorless viscous oil. Its salts are called peroxymonophosphates. Another peroxyphosphoric...
(also known as an acid halide) is a chemical compound derived from an oxoacid by replacing a hydroxyl group (−OH) with a halide group (−X, where X is...
follows: N2O5 ⇌ NO2 + NO3 → NO2 + O2 + NO N2O5 + NO ⇌ 3 NO2 Many nitrogen oxoacids are known, though most of them are unstable as pure compounds and are known...
redox reactions of the chlorine oxoacids. It is a strong oxidising agent, reacting with sulfur, phosphorus, phosphorus halides, and potassium borohydride...
IIII(IVO3)3 and [IO]+[IO3]− respectively. More important are the four oxoacids: hypoiodous acid (HIO), iodous acid (HIO2), iodic acid (HIO3), and periodic...
organosulfur compound and oxoacid with the general formula R−S−OH. It is the first member of the family of organosulfur oxoacids, which also include sulfinic...
a moiety derived by the removal of one or more hydroxyl groups from an oxoacid, including inorganic acids. It contains a double-bonded oxygen atom and...
inorganic oxoacids, organic peroxides and epoxides. Produce acidic and corrosive phosphorus pentoxide and sulfur dioxide when burned. "Phosphorus sulfide...
Diethyl ether – also known as "sweet oil of vitriol" Piranha solution Sulfur oxoacid Sulfuric acid poisoning Haynes, William M. (2014). CRC Handbook of Chemistry...
with ammonia at 200 °C (400 °F)), and TeF6 easily hydrolyzes to give an oxoacid. Oxygen's highest fluoride is oxygen difluoride, but fluorine can theoretically...
Sulfinic acids are oxoacids of sulfur with the structure RSO(OH). In these organosulfur compounds, sulfur is pyramidal. Sulfinic acids RSO2H are about...
IIII(IVO3)3 and [IO]+[IO3]− respectively. More important are the four oxoacids: hypoiodous acid (HIO), iodous acid (HIO2), iodic acid (HIO3), and periodic...
(nonmetallic) properties. Compared to phosphorus, the stronger metallic character of arsenic is indicated by the formation of oxoacid salts such as AsPO4, As2(SO4)3...
BaS2O6(aq) + H2SO4(aq) → H2S2O6(aq) + BaSO4(s)↓ Hypophosphoric acid, the phosphorus equivalent. International Union of Pure and Applied Chemistry (2005)....
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