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Phosphoric acid (orthophosphoric acid, monophosphoric acid or phosphoric(V) acid) is a colorless, odorless phosphorus-containing solid, and inorganic compound with the chemical formula H 3 P O 4. It is commonly encountered as an 85% aqueous solution , which is a colourless, odourless, and non- volatile syrupy liquid.
At pH 1 or lower, the phosphoric acid is practically undissociated. Around pH 4.7 (mid-way between the first two pK a values) the dihydrogen phosphate ion, [H 2 PO 4] −, is practically the only species present. Around pH 9.8 (mid-way between the second and third pK a values) the monohydrogen phosphate ion, [HPO 4] 2−, is the only species ...
Since the ends are condensed, its formula has one less H 2 O (water) than tripolyphosphoric acid. The general formula of a phosphoric acid is H n−2x+2 P n O 3n−x+1, where n is the number of phosphorus atoms and x is the number of fundamental cycles in the molecule's structure; that is, the minimum number of bonds that would have to be ...
Phosphomolybdic acid is the heteropolymetalate with the formula H 3 [Mo 12 PO 40]·12H 2 O. It is a yellow solid, although even slightly impure samples have a greenish coloration. It is also known as dodeca molybdophosphoric acid or PMA, is a yellow-green chemical compound that is freely soluble in water and polar organic solvents such as ethanol.
Molar mass: 81.99 g/mol Appearance white solid deliquescent: Density: 1.651 g/cm 3 (21 °C) ... Phosphorous acid slowly oxidizes in air to phosphoric acid. [5]
Molar mass: 177.97 g/mol Melting point: 71.5 °C (160.7 °F; 344.6 K) ... The compound is a component of polyphosphoric acid, an important source of phosphoric acid. [1]
Molar mass: 96.986 g·mol −1 Conjugate acid: ... This multistep conversion exemplifies that the dihydrogen phosphate ion is the conjugate base to phosphoric acid, ...
Molar mass: 454.11 g·mol −1 Appearance white solid Density: ... and magnesium oxide (MgO) powders with a liquid consisting principally of phosphoric acid, water, ...