IUPAC-NIST Solubility Database
NIST Standard Reference Database 106


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

Components:
   (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:
   Balabanovich, Ya.K.; Orekhov, I.I.; Tereshchenko, L.Ya., Trud. Sev.-Zapad. Politekh. Inst. 1969, 69.

Variables:

   Concentration = Temperature and composition

Prepared By:
   L.V. Chernykh and J. Eysseltov√°

Experimental Remarks:

   
Part 1. Definition of the sections:
Section 1 has a mass ratio for H2O/H3PO4 of 9.
Section 2 has a mass ratio for H2O/H3PO4 of 4.
Section 3 has a mass ratio for H2O/H3PO4 of 2.3.
Section 4 has a mass ratio for H2O/H3PO4 of 1.5.

Experimental Data:   (Notes on the Nomenclature)
(Please see footnotes following the table(s).)
  
Part 2. Eutectic points having NH4H2PO4 and ice as the equilibrium solid phases.
Solution numberInitial Temperature (TIn)/°CFinal Temperature (TFin)/°CChemical1102 * Mass Fraction w1Chemical2102 * Mass Fraction w2Chemical3102 * Mass Fraction w3m3 [mol/kg]Chemical4102 * Mass Fraction w4m4 [mol/kg]Chemical5102 * Mass Fraction w5
1 -6-12NH4H2PO416.60H3PO48.29NH3 (a)2.461.92H3PO4 (a)22.433.047H2O (a)75.11
2 -7-17NH4H2PO416.60H3PO416.70NH3 (a)2.462.16H3PO4 (a)30.844.718H2O (a)66.70
3-14.5-21NH4H2PO419.35H3PO424.15NH3 (a)2.862.98H3PO4 (a)40.637.339H2O (a)56.50
4-25.5-28NH4H2PO419.35H3PO432.35NH3 (a)2.863.48H3PO4 (a)48.8310.32H2O (a)48.30
Part 3. Solubility of NH4H2PO4 in aqueous solutions of H3PO4a.
Solution numbert/°C102 * Mass Fraction w1
11020.99
12026.63
13029.27
14031.50
15035.61
16040.84
17044.6
21023.57
22025.92
23028.69
24031.54
25034.07
26038.11
27041.31
31022.41
32024.99
33030.32
34032.24
35035.9
36038.69
37041.09
41021.09
42026.26
43029.21
44033.12
45036.28
46038.86
47041.19
Part 4. Using the data in Part 3, the compilers have calculated the following values.
Solution numbert/°CChemical1102 * Mass Fraction w1m1 [mol/kg]Chemical2102 * Mass Fraction w2m2 [mol/kg]Chemical3102 * Mass Fraction w3
Section 110NH33.112.57H3PO425.783.70H2O71.11
Section 120NH33.943.51H3PO430.024.64H2O66.03
Section 130NH34.334.00H3PO432.015.13H2O63.66
Section 140NH34.664.44H3PO433.685.58H2O61.65
Section 150NH35.275.34H3PO436.786.48H2O57.94
Section 160NH36.056.67H3PO440.717.80H2O53.24
Section 210NH33.493.35H3PO435.365.90H2O61.14
Section 220NH33.843.80H3PO436.906.35H2O59.26
Section 230NH34.254.37H3PO438.706.92H2O57.05
Section 240NH34.675.01H3PO440.567.56H2O54.77
Section 250NH35.045.62H3PO442.218.17H2O52.74
Section 260NH35.646.69H3PO444.849.24H2O49.51
Section 270NH36.127.65H3PO446.9310.20H2O46.95
Section 310NH33.323.60H3PO442.608.04H2O54.08
Section 320NH33.704.16H3PO444.028.59H2O52.28
Section 330NH34.495.43H3PO446.949.86H2O48.56
Section 340NH34.775.93H3PO448.0010.37H2O47.23
Section 350NH35.316.99H3PO450.0111.42H2O44.68
Section 360NH35.737.87H3PO451.5412.31H2O42.73
Section 370NH36.088.70H3PO452.8613.14H2O41.06
Section 410NH33.123.87H3PO449.5310.67H2O47.35
Section 420NH33.895.16H3PO451.8711.96H2O44.24
Section 430NH34.325.98H3PO453.2012.78H2O42.47
Section 440NH34.907.17H3PO454.9713.98H2O40.13
Section 450NH35.378.25H3PO456.3915.05H2O38.23
Section 460NH35.759.21H3PO457.5616.01H2O36.68
Section 470NH36.1010.15H3PO458.6116.95H2O35.29
Solution numbert/°CChemical1102 * Mass Fraction w1m1 [mol/kg]Chemical2102 * Mass Fraction w2m2 [mol/kg]Chemical3102 * Mass Fraction w3
Section 170NH36.607.78H3PO443.538.91H2O49.86
Notes:
   Table 2  a  These values were calculated by the compiler.
   Table 2  b  Eutectic temperature measured by heating.
   Table 2  c  Eutectic temperature measured by cooling
   Table 3  a  The solubility values are given as 100wi

Method/Apparatus/Procedure:
   A visual polythermic method was used. Standard methods of analysis were used, but no specific details are given.

Source and Purity of Materials:
   Chemically pure H3PO4 and recrystallized NH4H2PO4 were used.

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