IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Glass Ball as Bullet Solubility System: Ammonium dihydrogenphosphate with Ammonium chloride, Sodium dihydrogenphosphate, Sodium chloride and Water

   (1) Ammonium chloride; NH4Cl; [12125-02-9]  NIST Chemistry WebBook for detail
   (2) Ammonium dihydrogenphosphate; NH4H2PO4; [7722-76-1]  NIST Chemistry WebBook for detail
   (3) Sodium chloride; NaCl; [7647-14-5]  NIST Chemistry WebBook for detail
   (4) Sodium dihydrogenphosphate; NaH2PO4; [7558-80-7]  NIST Chemistry WebBook for detail
   (5) Water; H2O; [7732-18-5]  NIST Chemistry WebBook for detail

Original Measurements:
   Solov'ev, A.P.; Balashova, E.F.; Verendykina, N.A.; Zyuzina, L.F., Vzaimodeistvie Khloridov Kaliya, Magniya, Ammoniya s ikh Nitratami i Fosfatami 1977, 3.


   Concentration = Composition at 25 ºC.

Prepared By:
   J. Eysseltová

Experimental Data:   (Notes on the Nomenclature)
(Please see footnotes following the table(s).)
Solubility in the Na+, NH4+||Cl, H2PO4-H2O system at 25 °C.
Chemical1102 * Mass Fraction w1m1(a)Chemical2102 * Mass Fraction w2m2(a)Chemical3102 * Mass Fraction w3m3(a)Chemical4102 * Mass Fraction w4m4(a)Chemical5Chemical6Solid Phase(s)(b)
NaH2PO425.013.48NaCl15.134.33NH4H2PO4------NH4Cl------Na+H2PO4-A + B
NaH2PO424.743.63NaCl13.974.21NH4H2PO44.550.70NH4Cl------Na+H2PO4-A + B
NaH2PO423.263.51NaCl12.904.00NH4H2PO48.591.35NH4Cl------Na+H2PO4-A + B
NaH2PO424.193.85NaCl11.013.60NH4H2PO412.402.06NH4Cl------Na+H2PO4-A + B + C
NaH2PO443.478.12NaCl------NH4H2PO411.932.35NH4Cl------Na+H2PO4-B + C
NaH2PO438.327.25NaCl4.541.76NH4H2PO413.112.59NH4Cl------Na+H2PO4-B + C
NaH2PO432.905.20NaCl8.002.96NH4H2PO412.792.40NH4Cl------Na+H2PO4-B + C
NaH2PO430.545.37NaCl9.333.37NH4H2PO412.782.35NH4Cl------Na+H2PO4-B + C
NaH2PO412.301.78NaCl16.874.96NH4H2PO412.581.88NH4Cl------Na+H2PO4-A + C
NaH2PO4------NaCl20.855.75NH4H2PO417.102.40NH4Cl------Na+H2PO4-A + C
NaH2PO4------NaCl16.074.21NH4H2PO45.640.75NH4Cl12.933.70Na+H2PO4-A + C + D
NaH2PO4------NaCl17.074.41NH4H2PO42.820.37NH4Cl13.883.92Na+H2PO4-A + D
NaH2PO4------NaCl17.154.40NH4H2PO4------NH4Cl16.144.52Na+H2PO4-A + D
NaH2PO4------NaCl8.682.18NH4H2PO44.480.57NH4Cl18.755.15Na+H2PO4-C + D
NaH2PO4------NaCl5.891.48NH4H2PO45.150.66NH4Cl21.115.82Na+H2PO4-C + D
NaH2PO4------NaCl1.590.39NH4H2PO45.600.70NH4Cl22.916.13Na+H2PO4-C + D
NaH2PO4------NaCl------NH4H2PO46.120.78NH4Cl25.546.98Na+H2PO4-C + D
   Table 1  a  These values were calculated by the compiler.
   Table 1  b  The solid phases are: A=NCl; B=NaH2PO4·2H2O; C=NH4H2PO4; D=NH4Cl.
   Table 1  c  In the original article these values were designated as ion %. The compiler believes that the units here are: mol/100 mol of solute.

   The method of invariant points was used. A third component was added to eutectic systems until a new solid phase appeared. At equilibrium both liquid and solid phases were analyzed. Chloride ion content was determined by the Volhard method. H2PO4 ions were precipitated as NH4MgPO4·6H2O, and the excess of Mg was titrated complexometrically.1. Ammonium ions were removed and the excess of base was titrated with HCl.

Source and Purity of Materials:
   No information is given.

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

   1F. M. Shemyakin, E. N. Zelenina, Zavod. Lab. 6 (1969).