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Ammonium phosphomolybdate can be made by heating ammonium orthomolybdate combined with phosphoric acid and nitric acid, yielding ammonium nitrate, water, and a yellow precipitate of ammonium phosphomolybdate is obtained. [3] 12 (NH 4) 6 Mo 7 O 24 (H 2 O) 4 + 7 Na 2 HPO 4 (H 2 O) + 65 HNO 3 → 7 (NH 4) 3 Mo 12 PO 40 + 51 NH 4 NO 3 + 14 NaNO 3 ...
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.
A simple qualitative method to determine the presence of phosphate ions in a sample is as follows. A small amount of the sample is acidified with concentrated nitric acid, to which a little ammonium molybdate is added. The presence of phosphate ions is indicated by the formation of a bright yellow precipitate layer of ammonium phosphomolybdate ...
In chemistry, a molybdate is a compound containing an oxyanion with molybdenum in its highest oxidation state of +6: O − −Mo(=O) 2 −O −. Molybdenum can form a very large range of such oxyanions , which can be discrete structures or polymeric extended structures, although the latter are only found in the solid state.
The following example describes the determination of phosphorus. A sample containing the phosphate is mixed with an acid solution of Mo VI, for example ammonium molybdate, to produce PMo 12 O 3− 40, which has an α-Keggin structure. This anion is then reduced by, for example, ascorbic acid or SnCl 2, to form the blue coloured β-keggin ion ...
Ammonium orthomolybdate is the inorganic compound with the chemical formula (NH 4) 2 MoO 4. It is a white solid that is prepared by treating molybdenum trioxide with aqueous ammonia. Upon heating these solutions, ammonia is lost, to give ammonium heptamolybdate ((NH 4 ) 6 Mo 7 O 24 ·4H 2 O).
Ammonium molybdate can refer to: Ammonium orthomolybdate, (NH 4) 2 MoO 4; Ammonium heptamolybdate, (NH 4) 6 Mo 7 O 24, usually encountered as the tetrahydrate; Ammonium phosphomolybdate, (NH 4) 3 PMo 12 O 40; Ammonium tetrathiomolybdate, (NH 4) 2 MoS 4 this chemical is used for analysis of chloride in a solution
The molybdovanadate reagent is a solution containing both the molybdate and vanadate ions. It is commonly used in the determination of phosphate ion content. [1] [2] The reagent used is ammonium molybdovanadate with the addition of 70% perchloric acid (sulfuric acid is also known to be used).