Sodium monohydrogen

Starch sodium phosphate monoesters [11120-02-8] are prepared by heating mixtures of 10% moisture starch and sodium monohydrogen and dihydrogen phosphates or sodium tripolyphosphate. Starch phosphate monoesters are used primarily in foods, such as pudding starches and with oH-in-water emulsions. 

Dissolve in the following order azelastine hydrochloride, edetic acid, sodium chloride, benzalkonium chloride, citric acid, and sodium monohydrogen-phosphate, and mix well. 

At room temperatures solutions of sodium monohydrogen arsenate... 

The addition of sodium monohydrogen arsenate to a solution of an aluminium salt results in the precipitation of a white powder which is probably aluminium hydrogen arsenate,5 Al2(HAs04)3. The powder dissolves in acids and the solution in hydrochloric acid when boiled with ammonium sulphite yields a precipitate of aluminium hydroxide, the arsenic remaining in solution. When heated in a current of hydrogen, arsenic is volatilised.6... 

Iron Arsenates.—Ferrous Ortkoarsenate, Fe3(As04)3.6H20, is obtained as a white precipitate when ammonium orthoarsenate1 or sodium monohydrogen arsenate 2 is added to an aqueous solution of ferrous sulphate. In the latter ease the reaction is stated to be ... 

Sodium dihydrogen arsenate or arsenic acid does not precipitate mercuric chloride solution, but the latter reacts with normal silver arsenate to form normal mercuric arsenate and silver chloride. Yellow precipitates containing normal mercuric arsenate, mercuric chloride and mercuric oxide are thrown down from mercuric chloride solution by a solution of sodium monohydrogen arsenate. 

Molybdenum Arsenates and Molybdo-arsenates.—Molybdous Arsenate, Mo(HAs04)2.wH20( ), is said1 to be formed as a grey precipitate when molybdous chloride is treated with sodium monohydrogen arsenate the precipitate first redissolves, hut afterwards becomes permanent. Molybdic arsenate, obtained in a similar manner from molybdic chloride, has been described by Berzelius, who also considered that an acid salt was produced on dissolving the hydrate of molybdenum dioxide in excess of arsenic acid, since the solution turned blue on standing.1... 

A gelatinous precipitate of lanthanum monohydrogen orthoarsenate, La2(HAs04)3.wH20, is formed when sodium monohydrogen orthoarsenate is added to a solution of lanthanum sulphate.3 A similar product has been obtained with didymium sulphate. 

The anhydrous salt is obtained1 by heating the crystals to 120° C, If crystallisation takes place at the ordinary temperature, the dodeca-hydrate, Na2HAs04.12H20, is obtained while if the crystals are formed above 36° C. the heptahydrate, Na2HAs04.7H20, is produced. The transition point determined from the solubility curve of sodium monohydrogen arsenate in water 2 is at 22° C. 

The salt may also be obtained by the action of hot water on strontium dihydrogen orthoarsenate 8 or on the pyroarsenate 9 or by the action of ammonia on a hot solution in hydrochloric acid of the precipitate obtained by mixing solutions of strontium chloride and sodium monohydrogen orthoarsenate.10 In the last case the anhydrous salt crystallises out, but if the mother liquor is kept in an atmosphere of ammonia, the monohydrate, SrHAs04.H20, crystallises out. The density of the latter is 3-606 at 15° C. and of the anhydrous salt 4-035. The monohydrate becomes anhydrous at 130° C. and at a higher temperature yields the pyroarsenate.11... 

A basic arsenate of composition 3Sr3(As04)2.Sr(0H)2 has been obtained3 as a fine flaky precipitate by the action of sodium hydroxide and strontia-water on an acidified solution of sodium monohydrogen orthoarsenate, care being taken to ensure the absence of carbonate. 

Zirconium Arsenates.—Zirconium Orthoarsenate, Zr3(As04)4. 5H20, has been obtained 5 as a voluminous white precipitate by adding sodium monohydrogen orthoarsenate to a solution of zireonyl fluoride in hydrochloric acid. Zirconium monohydrogen orthoarsenate, Zr(HAs04)2, appears to be formed slowly by adsorption of arsenic acid by zirconium dioxide.6... 

Zireonyl Pyroarsenate, (Zr0)2As207.nH20, is obtained as a white precipitate when sodium monohydrogen orthoarsenate is added to a solution of zirconium sulphate.7 When dried at 110° C. the monohydrate, (Zr0)2As207.H20, remains. It is insoluble in water, but readily dissolves in hydrochloric acid. 

Write a balanced equation for the reaction of sodinm hydroxide with phosphoric acid to produce sodium monohydrogen phosphate and water. 

Na2HP04 Sodium monohydrogen phosphate (or disodium hydrogen phosphate)... 

SYNS ARSENIC ACID, SODIUM SALT (9CI) SODIUM ARSENATE SODIUM METAARSENATE SODIUM MONOHYDROGEN ARSENATE... 

SYNS DIBASIC SODIUM PHOSPHATE DISODIUM HYDROGEN PHOSPHATE DISODIUM MONOHYDROGEN PHOSPHATE DISODIUM ORTHOPHOSPHATE DISODIUM PHOSPHATE DISODEJM PHOSPHORIC ACID DSP EXSICCATED SODIUM PHOSPHATE NATRIUMPHOSPHAT (GERMAN) PHOSPHORIC ACID, DISODIUM SALT SODA PHOSPHATE SODIUM HYDROGEN PHOSPHATE SODIUM MONOHYDROGEN PHOSPHATE (2 1 1)... 

SODIUM MONODODECYL SULFATE see SIB600 SODIUM MONOFLUORIDE see SHF500 SODIUM MONOFLUOROACETATE see SHG500 SODIUM MONOHYDROGEN ARSENATE see ARD500 SODIUM MONOHYDROGEN PHOSPHATE (2 1 1) see SJH090... 

Use Table 7 to calculate the pH of a buffer solution made from equal amounts of sodium monohydrogen phosphate and potassium dihydrogen phosphate. 

Problem A buffered solution maintains acidity as a reaction occurs. In living cells, phosphate ions play a key buffering role, so biochemists often study reactions in such solutions. How many grams of solute are in 1.75 L of 0.460 M sodium monohydrogen phosphate Plan We know the solution volume (1.75 L) and molarity (0.460 M), and we need the mass of solute. We use the known quantities to find the amount (mol) of solute and then convert moles to grams with the solute molar mass, as shown in the roadmap. 

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