IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Glass Ball as Bullet Solubility System: Ammonia with Phosphoric acid and Water

   (1) Ammonia; NH3; [7664-41-7]  NIST Chemistry WebBook for detail
   (2) Phosphoric acid; H3PO4; [7664-38-2]  NIST Chemistry WebBook for detail
   (3) Water; H2O; [7732-18-5]  NIST Chemistry WebBook for detail

Original Measurements:
   Shenkin, Ya.S.; Ruchnova, S.A.; Shenkina, A.P., Zh. Neorg. Khim. 1969, 14, 1420.


   Concentration = Temperature and composition at atmospheric pressure.

Prepared By:
   J. Eysseltová

Experimental Remarks:

   Remarks: NOTE: According to the authors, the "temperature depression" (not defined) is a nearly linear function of –lg N.

Experimental Data:   (Notes on the Nomenclature)
(Please see footnotes following the table(s).)
Composition and boiling points in the NH4H2PO4-H3PO4-H2O system.
Boiling Point/°CChemical1102 * Mass Fraction w1Chemical2102 * Mass Fraction w2Chemical3102 * Mass Fraction w3m3 [mol/kg]Chemical4102 * Mass Fraction w4m4 [mol/kg]Chemical5102 * Mass Fraction w5Mole Fractio5n-lg N (b)Comment(s)
109.4NH4H2PO471.84H3PO4     0.00NH3 (a)10.6322.18H3PO4 (a)61.2022.18H2O (a)28.160.1463 0.1463   -lg N (b)
110.8NH4H2PO467.90H3PO4     1.82NH3 (a)10.0519.49H3PO4 (a)59.6620.11H2O (a)30.280.13430.1343
111.1NH4H2PO464.20H3PO4     8.90NH3 (a)9.5020.75H3PO4 (a)63.5924.12H2O (a)26.900.15680.1568
112.0NH4H2PO460.01H3PO4     14.12NH3 (a)8.8820.16H3PO4 (a)65.2425.73H2O (a)25.870.16560.1656
115.1NH4H2PO457.22H3PO4      22.34NH3 (a)8.4724.33H3PO4 (a)71.0835.49H2O (a)20.440.18650.1865
119.2NH4H2PO459.44H3PO4     23.21NH3 (a)8.8029.78H3PO4 (a)73.8543.43H2O (a)17.350.25100.2510
122.9NH4H2PO458.29H3PO4     29.02NH3 (a)8.6339.93H3PO4 (a)78.6863.26H2O (a)12.690.36330.3633
147.0NH4H2PO464.53H3PO4     30.98NH3 (a)9.55124.9H3PO4 (a)85.95195.3H2O (a)4.490.65560.6556
152.0NH4H2PO471.50H3PO4     24.64NH3 (a)10.58161.0H3PO4 (a)85.55226.2H2O (a)3.860.70540.7054
155.6NH4H2PO476.76H3PO4     19.50NH3 (a)11.36178.4H3PO4 (a)84.89231.6H2O (a)3.740.71460.7146
149.8NH4H2PO479.72H3PO4     16.24NH3 (a)11.80171.5H3PO4 (a)84.15212.5H2O (a)4.040.68400.6840
161.0NH4H2PO482.82H3PO4     14.71NH3 (a)12.26291.5H3PO4 (a)85.26352.2H2O (a)2.470.86620.8662
170.8NH4H2PO483.17H3PO4     14.75NH3 (a)12.31347.6H3PO4 (a)85.60419.9H2O (a)2.080.93180.9318
170.0NH4H2PO486.60H3PO4     12.31NH3 (a)12.82690.6H3PO4 (a)86.08805.9H2O (a)1.091.19061.1906
212.0NH4H2PO490.56H3PO4     6.00NH3 (a)13.41228.8H3PO4 (a)83.15246.6H2O (a)3.440.73750.7375
210.5NH4H2PO490.56H3PO4     8.19NH3 (a)13.41629.8H3PO4 (a)85.34696.6H2O (a)1.251.18051.1805
221.5NH4H2PO492.77H3PO4     4.39NH3 (a)13.73283.9H3PO4 (a)83.42299.7H2O (a)2.840.90790.9079
   Table 1  a  These values were calculated by the compilers.
   Table 1  b  N is the mol fraction of water in the system.

   The method was the same as that described earlier.1

Source and Purity of Materials:
   Chemically pure salts were recrystallized before being used.

Estimated Errors:
   Solubility: No information is given.
   Temperature: No information is given.

   1Shenkin, Ya.S.; Ruchnova, S.A.; Shenkina, A.P. Zh. Neorg. Khim. 1968, 13, 256.