IUPAC-NIST Solubilities Database

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IUPAC-NIST Solubility Database NIST Standard Reference Database 106 Glass Ball as Bullet Solubility System: Diammonium hydrogenphosphate with Ammonium chlorate, Magnesium hydrogenphosphate, Magnesium chlorate and Water Components: (1) Ammonium chlorate; NH4ClO3; [10192-29-7] NIST Chemistry WebBook for detail (2) Diammonium hydrogenphosphate; (NH4)2HPO4; [7783-28-0] NIST Chemistry WebBook for detail (3) Magnesium chlorate; Mg(ClO3)2; [10326-21-3] NIST Chemistry WebBook for detail (4) Magnesium hydrogenphosphate; MgHPO4; [7757-86-0] NIST Chemistry WebBook for detail (5) Water; H2O; [7732-18-5] NIST Chemistry WebBook for detail Original Measurements: Tukhtaev, S.; Kucharov, Kh.; Askarova, M.K., Uzb. Khim. Zh. 1977, 32. Variables: Concentration = Temperature and composition. Prepared By: L. V. Chernykh and J. Eysseltová Experimental Data: (Notes on the Nomenclature) (Please see footnotes following the table(s).) Solutions co-existing with three solid phases in the (NH4)2HPO2-Mg(ClO3)2-H2O system
t/°CChemical1102 * Mass Fraction w1m1 [mol/kg](a)Chemical2102 * Mass Fraction w2m2 [mol/kg](a)Chemical3102 * Mass Fraction w3Solid Phase(s)(b)
-52.1Mg(ClO3)236.32.99(NH4)2HPO40.200.024H2O63.5A + B + C
-21.8Mg(ClO3)240.43.56(NH4)2HPO40.200.025H2O59.4B + C + D
-7.6Mg(ClO3)243.84.09(NH4)2HPO40.250.034H2O55.95C + D + E
-5.7Mg(ClO3)20.30.02(NH4)2HPO425.12.55H2O74.6A + C + F
-14.9Mg(ClO3)20.40.03(NH4)2HPO438.84.83H2O60.8C + F + G
 Notes: Table 1 a The molalities were calculated by the compilers. Table 1 b The solid phases are: A=ice; B=Mg(ClO3)2·16H2O; C=Mg3(PO4)2·18H2O; D=Mg(ClO3)2·12H2O; E=Mg(ClO3)2·6H2O; F=(NH4)2HPO2·2H2O; G=(NH4)2HPO2. Method/Apparatus/Procedure: A visual polythermic method and the isothermal method were used but details are not given. Source and Purity of Materials: Chemically pure (NH4)2HPO4 was recrystallized twice. Mg(ClO3)2 was recrystallized from ether. After the final recrystallization its purity was 99.1%. Estimated Errors: Solubility: No information is given. Temperature: No information is given.

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