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Molybdic acid refers to hydrated forms of molybdenum trioxide and related species. The monohydrate (MoO 3 ·H 2 O) and the dihydrate (MoO 3 ·2H 2 O) are well ...
The laboratory synthesis of the dihydrate entails acidification of aqueous solutions of sodium molybdate with perchloric acid: [12] Na 2 MoO 4 + H 2 O + 2 HClO 4 → MoO 3 ·2H 2 O + 2 NaClO 4. The dihydrate loses water readily to give the monohydrate. Both are bright yellow in color. Molybdenum trioxide dissolves slightly in water to give ...
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.
structure of solid sodiium molybdate dihydrate. In aqueous solution, sodium molybdate features dissociated sodium ions and tetrahedral molybdate (MoO 4 2-), which adopts a sulfate-like structure.
Ammonium heptamolybdate is the inorganic compound whose chemical formula is (NH 4) 6 Mo 7 O 24, normally encountered as the tetrahydrate.A dihydrate is also known. It is a colorless solid, often referred to as ammonium paramolybdate or simply as ammonium molybdate, although "ammonium molybdate" can also refer to ammonium orthomolybdate, (NH 4) 2 MoO 4, and several other compounds.
Keggin structure James F. Keggin, the discoverer of the Keggin Structure. Keggin structure. The Keggin structure is the best known structural form for heteropoly acids.It is the structural form of α-Keggin anions, which have a general formula of [XM 12 O 40] n −, where X is the heteroatom (most commonly are pentavalent phosphorus P V, tetravalent silicon Si IV, or trivalent boron B III), M ...
An alternative formulation involves "digesting" molybdenum sulfide with nitric acid to form molybdic acid, which is then mixed with tin filings and a little muriatic acid (HCl). [3] This is evaporated and heated with alumina. A 1955 paper states that molybdenum blue is unstable and is not used commercially as a pigment. [25]
Structure of molybdate 3D model of the molybdate ion. In chemistry, a molybdate is a compound containing an oxyanion with molybdenum in its highest oxidation state of +6: O − −Mo(=O) 2 −O −.
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