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Polymeric sodium phosphates are formed upon heating mixtures of NaH 2 PO 4 and Na 2 HPO 4, which induces a condensation reaction. The specific polyphosphate generated depends on the details of the heating and annealing. One derivative is the glassy (i.e., amorphous) Graham's salt (sodium hexametaphosphate).
Trisodium phosphate has gained a following as a nutritional supplement that can improve certain parameters of exercise performance. [14] The basis of this belief is the fact that phosphate is required for the energy-producing Krebs cycle central to aerobic metabolism. Phosphates are available from a number of other sources that are much milder ...
The name pyrophosphoric acid was given by a "Mr. Clarke of Glasgow" in 1827 who is credited with its discovery following the heating to red heat of a sodium phosphate salt. It was found that phosphoric acid when heated to red heat formed pyrophosphoric acid that was readily converted to phosphoric acid by hot water. [7]
The term phosphate is also used in organic chemistry for the functional groups that result when one or more of the hydrogens are replaced by bonds to other groups. These acids, together with their salts and esters , include some of the best-known compounds of phosphorus, of high importance in biochemistry , mineralogy , agriculture , pharmacy ...
Sodium tripolyphosphate is produced by heating a stoichiometric mixture of disodium phosphate, Na 2 HPO 4, and monosodium phosphate, NaH 2 PO 4, under carefully controlled conditions. [2] 2 Na 2 HPO 4 + NaH 2 PO 4 → Na 5 P 3 O 10 + 2 H 2 O. In this way, approximately 2 million tons are produced annually. [3]
SHMP is prepared by heating monosodium orthophosphate to generate sodium acid pyrophosphate: 2 NaH 2 PO 4 → Na 2 H 2 P 2 O 7 + H 2 O. Subsequently, the pyrophosphate is heated to give the corresponding sodium hexametaphosphate: 3 Na 2 H 2 P 2 O 7 → (NaPO 3) 6 + 3 H 2 O. followed by rapid cooling.
Disodium pyrophosphate or sodium acid pyrophosphate (SAPP) [1] is an inorganic compound with the chemical formula Na 2 H 2 P 2 O 7. It consists of sodium cations (Na +) and dihydrogen pyrophosphate anions (H 2 P 2 O 2− 7). It is a white, water-soluble solid that serves as a buffering and chelating agent, with many applications in the food ...
Sodium carbonate: Solid Na 2 CO 3: −1130.77 Sodium chloride: Aqueous NaCl −407.27 Sodium chloride: Solid NaCl −411.12 Sodium chloride: Liquid NaCl −385.92 Sodium chloride: Gas NaCl −181.42 Sodium chlorate: Solid NaClO 3: −365.4 Sodium fluoride: Solid NaF −569.0 Sodium hydroxide: Aqueous NaOH −469.15 Sodium hydroxide: Solid NaOH ...