IUPAC-NIST Solubility Database
NIST Standard Reference Database 106


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

Components:
   (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) Potassium chloride; KCl; [7747-40-7]  NIST Chemistry WebBook for detail
   (4) Potassium dihydrogenphosphate; KH2PO4; [7778-77-0]  NIST Chemistry WebBook for detail
   (5) Water; H2O; [7732-18-5]  NIST Chemistry WebBook for detail

Original Measurements:
   Polosin, V.A.; Shakhparonov, M.I., Zh. Fiz. Khim. 21, 119 (1947).

Variables:

   Concentration = Composition and temperature.

Prepared By:
   J. Eysseltová

Experimental Data:   (Notes on the Nomenclature)
(Please see footnotes following the table(s).)
  
Part 1. Solubility isotherms in the (NH4)3PO4-H3PO4-Ca3(PO4)2-H2O system with the ratio NH3/H3PO4 = 0.5.
t/°CChemical1 Composition1(a)102 * Mass Fraction w1m1 [mol/kg](b)Chemical2 Composition2(a)102 * Mass Fraction w2m2 [mol/kg](b)Chemical3 Composition3(a)102 * Mass Fraction w3Solid Phase(s)(c)
-10KCl100.019.103.171NH4H2PO4 0.000.000.00H2O174480.90A
-10KCl94.4017.752.954NH4H2PO4 5.601.650.178H2O177280.60A
-10KCl84.4019.123.242NH4H2PO4 5.60d1.780.196H2O161379.10B
-10KCl100.09.801.46NH4H2PO4 0.000.000.00H2O166890.20C
0KCl100.021.653.707NH4H2PO4 0.000.000.00H2O149678.35C
0KCl94.4021.323.728NH4H2PO4 5.601.980.224H2O140476.70B
0KCl91.2019.003.260NH4H2PO4 8.802.830.315H2O155278.17D
0KCl77.6011.761.900NH4H2PO422.405.240.549H2O226683.00D
0KCl58.008.201.33NH4H2PO442.009.180.966H2O241582.62D
0KCl40.006.101.02NH4H2PO460.0014.081.533H2O217079.82D
0KCl17.002.390.402NH4H2PO483.0017.811.940H2O237179.80D
0KCl 0.000.000.00NH4H2PO4100.018.501.973H2O281381.50E
10KCl100.023.504.120NH4H2PO4 0.000.000.00H2O134876.50C
10KCl94.4023.334.200NH4H2PO4 5.602.170.253H2O124674.50F
10KCl93.0023.104.175NH4H2PO4 7.60d2.690.315H2O122674.21F
10KCl77.6013.562.262NH4H2PO422.406.040.653H2O190380.40D
10KCl65.4010.901.823NH4H2PO434.608.910.966H2O199180.19D
10KCl47.508.101.39NH4H2PO452.5013.781.533H2O189878.12D
10KCl32.205.001.03NH4H2PO467.8018.842.173H2O173475.36D
10KCl17.002.850.504NH4H2PO483.0021.252.434H2O189075.90D
10KCl 0.000.000.00NH4H2PO4100.022.102.466H2O225177.90E
20KCl100.025.704.639NH4H2PO4 0.000.000.00H2O119574.30C
20KCl94.4024.894.586NH4H2PO4 5.602.310.276H2O113572.80F
20KCl90.4022.634.120NH4H2PO4 9.603.700.437H2O121873.67F
20KCl77.6015.362.648NH4H2PO422.406.840.764H2O162577.80D
20KCl71.0013.702.366NH4H2PO429.008.630.966H2O166677.67D
20KCl53.9010.201.792NH4H2PO446.1013.471.534H2O167176.33D
20KCl40.108.001.46NH4H2PO459.9018.402.173H2O152973.60D
20KCl20.003.900.726NH4H2PO490.00d24.022.897H2O153372.08D
20KCl17.003.300.615NH4H2PO483.0024.702.982H2O154472.00D
20KCl 0.000.000.00NH4H2PO4100.026.303.102H2O178973.70E
25KCl100.026.504.836NH4H2PO4 0.000.000.00H2O114773.50G
25KCl94.4025.624.772NH4H2PO4 5.602.380.287H2O109672.00F
25KCl91.1025.004.709NH4H2PO4 8.903.800.464H2O107271.20F
25KCl89.7022.564.120NH4H2PO410.304.000.473H2O120873.44D
25KCl77.6016.262.851NH4H2PO422.44d7.240.823H2O151076.50D
25KCl73.3015.002.630NH4H2PO426.708.500.966H2O154476.50D
25KCl56.7011.302.010NH4H2PO443.3013.301.533H2O156775.40D
25KCl43.509.101.68NH4H2PO456.5018.182.173H2O144172.72D
25KCl29.606.401.32NH4H2PO470.4028.403.787H2O134765.20D
25KCl17.003.540.678NH4H2PO483.0026.463.286H2O140170.00D
25KCl 0.000.000.00NH4H2PO4100.028.403.448H2O147671.60E
35KCl100.027.705.138NH4H2PO4 0.000.000.00H2O107772.30G
35KCl94.4027.175.184NH4H2PO4 5.602.530.313H2O101070.30F
35KCl90.7024.964.712NH4H2PO4 9.304.000.489H2O106771.04D
35KCl86.9022.284.121NH4H2PO413.105.200.623H2O117072.52D
35KCl77.6018.003.262NH4H2PO422.408.000.940H2O132074.00D
35KCl77.0017.803.227NH4H2PO423.008.220.966H2O132373.98D
35KCl62.6014.002.569NH4H2PO437.4012.901.534H2O135373.10D
35KCl49.3011.402.157NH4H2PO450.2017.722.173H2O128270.88D
35KCl39.609.601.899NH4H2PO460.4022.602.898H2O115267.80D
35KCl17.004.010.717NH4H2PO483.0020.992.433H2O116575.00D
Part 2. Monovariant and invariant points
t/°CChemical1 Composition1(a)102 * Mass Fraction w1m1(b)Chemical2 Composition2(a)102 * Mass Fraction w2m2(b)Chemical3 Composition3(a)102 * Mass Fraction w3Solid Phase(s)(c)
-10.4KCl100.019.803.311NH4H2PO4 0.000.000.00H2O168080.20A + C
22.2KCl100.026.204.761NH4H2PO4 0.000.000.00H2O116573.80B + F
-2.4KCl 0.000.000.00NH4H2PO4100.017.301.819H2O305382.70A + E
-11.2KCl92.4018.403.114NH4H2PO4 7.602.350.258H2O164579.25A + B + E
12.5KCl91.7022.304.012NH4H2PO4 8.303.150.367H2O126774.55B + D + F
-11.0KCl94.4018.803.176NH4H2PO4 5.601.800.197H2O164579.40A + B
8.0KCl94.4023.054.133NH4H2PO4 5.602.150.250H2O126674.80B + Fd
-4.9KCl17.002.150.353NH4H2PO483.0016.051.706H2O269881.80A + D
-5.0KCl25.303.200.522NH4H2PO474.7014.521.534H2O270182.28A + D
-5.7KCl52.206.601.05NH4H2PO447.809.340.966H2O275084.06A + D
-6.5KCl77.6010.521.664NH4H2PO422.404.680.480H2O258984.80A + D
-8.6KCl88.5014.902.434NH4H2PO411.502.980.315H2O202082.12A + D
2.7KCl92.5021.803.875NH4H2PO4 7.502.740.316H2O132475.46B + D
9.8KCl61.30e22.704.117NH4H2PO4 8.703.350.394H2O123073.95D + F
24.0KCl91.1025.004.709NH4H2PO4 8.903.800.464H2O107271.20D + F
Notes:
   Table 1  a  The composition unit is: mol/100 mol of solute.
   Table 1  b  These values were calculated by the compiler based on the mass % values of the components.
   Table 1  c  The solid phases are: A=ice; B=α-(NH4,K)Cl; C=α-KCl; D=(NH4,K)H2PO4; E=NH4H2PO4; F=β-(NH4,K)Cl; G= β-KCl.
   Table 1  d  This is an obvious error.
   Table 2  a  The composition unit is: mol/100 mol of solute.
   Table 2  b  The molalities were calculated by the compiler and are based on the mass % values of the components.
   Table 2  c  The solid phases are: A=ice; B=α-(NH4,K)Cl; C=α,KCl; D=(NH4,K)H2PO4; E=NH4H2PO4 F=β-(NH4,K)Cl; G=β,KCl.
   Table 2  d  In this line, the expression "β-(NH4H2K)Cl" stands for one of the solid phases. The compiler believes that this is an error.
   Table 2  e  This is obviously an error. The correct value is 91.30.

Method/Apparatus/Procedure:
   A polythermic method was used. Solid carbon dioxide served as the cooling agent.

Source and Purity of Materials:
   All materials were recrystallized twice and analyzed before being used. No further details are given.

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