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Phosphate can form many polymeric ions such as pyrophosphate, [P 2 O 7] 4−, and triphosphate, [P 3 O 10] 5−. The various metaphosphate ions (which are usually long linear polymers) have an empirical formula of [PO 3] − and are found in many compounds.
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 broken to eliminate all cycles.
Crystalline high molecular weight polyphosphates include Kurrol's salt and Maddrell's salt (CAS#10361-03-2). These species have the formula [NaPO 3 ] n [NaPO 3 (OH)] 2 where n can be as great as 2000, and it is a white powder practically insoluble in water.
Disodium phosphate (DSP), or disodium hydrogen phosphate, or sodium phosphate dibasic, is an inorganic compound with the chemical formula Na 2 H P O 4. It is one of several sodium phosphates. The salt is known in anhydrous form as well as hydrates Na 2 HPO 4 ·nH 2 O, where n is 2, 7, 8, and 12. All are water-soluble white powders. The ...
Monopotassium phosphate (MKP) (also, potassium dihydrogen phosphate, KDP, or monobasic potassium phosphate) is the inorganic compound with the formula KH 2 PO 4. Together with dipotassium phosphate (K 2 HPO 4. (H 2 O) x) it is often used as a fertilizer, food additive, and buffering agent.
Ammonium phosphate is the inorganic compound with the formula (NH 4) 3 PO 4. It is the ammonium salt of orthophosphoric acid. A related "double salt", (NH 4) 3 PO 4. (NH 4) 2 HPO 4 is also recognized but is impractical to use. Both triammonium salts evolve ammonia.
Monopotassium phosphate Dipotassium phosphate Tripotassium phosphate. Potassium phosphate is a generic term for the salts of potassium and phosphate ions including: [1] Monopotassium phosphate (KH 2 PO 4) (Molar mass approx: 136 g/mol) Dipotassium phosphate (K 2 HPO 4) (Molar mass approx: 174 g/mol) Tripotassium phosphate (K 3 PO 4) (Molar mass ...
Vanadium(III) phosphates lacking the oxo ligand have the formula VPO 4 •H 2 O and VPO 4 •2H 2 O. The monohydrate is isostructural with MgSO 4 •H 2 O [8] It adopts the structure of the corresponding hydrated aluminium phosphate. Oxidation of VPO 4 •H 2 O yields the two-electron electroactive [9] material ε-VOPO 4 [10]