IUPAC-NIST Solubilities Database

IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Solubility System: Ammonia with Nitric acid, Phosphoric acid, Calcium oxide and Water

Components:
   (1) Ammonia; NH3; [7664-41-7]  NIST Chemistry WebBook for detail
   (2) Calcium oxide; CaO; [1305-78-8]  NIST Chemistry WebBook for detail
   (3) Nitric acid; HNO3; [7697-37-2]  NIST Chemistry WebBook for detail
   (4) Phosphoric acid; H3PO4; [7664-38-2]  NIST Chemistry WebBook for detail
   (5) Water; H2O; [7732-18-5]  NIST Chemistry WebBook for detail

Original Measurements:
   Flatt, R.; Brunisholz, G.; Lauber, E., Helv. Chim. Acta 1953, 36, 1971.

Variables:

   Concentration = Composition at 25 ºC.

Prepared By:
   J. Eysseltová

Experimental Data:   (Notes on the Nomenclature)
(Please see footnotes following the table(s).)

Composition of saturated solutions coexisting with Ca(H₂PO₄)₂·H₂O and NH₄N₂PO₄ at 25 °C.
Solution number	Chemical₁	Solubility₁ [eq %]	Chemical₂	Solubility₂ [eq %]	Chemical₃	Solubility₃ [eq %]	Chemical₄	Solubility₄ [eq %]	Chemical₅	Solubility₅ [eq %]	Chemical₆	Mole Fraction₆^(a)
1	Ca2+	3.30	NH4+	15.58	H+	81.12	NO3-	4.43	PO43-	95.57	H2O	90.4
2	Ca2+	7.98	NH4+	18.89	H+	73.13	NO3-	10.39	PO43-	89.61	H2O	146.6
3	Ca2+	8.61	NH4+	18.88	H+	72.51	NO3-	10.56	PO43-	89.44	H2O	148.8
4	Ca2+	9.51	NH4+	21.52	H+	68.97	NO3-	15.77	PO43-	84.23	H2O	148.9
5	Ca2+	9.31	NH4+	26.97	H+	63.72	NO3-	25.22	PO43-	74.78	H2O	116.4
6	Ca2+	13.14	NH4+	27.87	H+	58.99	NO3-	27.51	PO43-	72.49	H2O	169.0
7	Ca2+	14.01	NH4+	35.61	H+	50.38	NO3-	39.95	PO43-	60.05	H2O	141.3
8	Ca2+	18.13	NH4+	41.49	H+	40.38	NO3-	51.24	PO43-	48.76	H2O	170.1
9	Ca2+	17.74	NH4+	45.01	H+	37.25	NO3-	55.39	PO43-	44.61	H2O	149.5

Part 2. The compiler has used the data in Part 1 to calculate the following values. Composition of saturated solutions coexisting with Ca(H₂PO₄)₂·H₂O and NH₄H₂PO₄ at 25 °C.
Solution number	Chemical₁	10² * Mass Fraction w₁	Chemical₂	10² * Mass Fraction w₂	Chemical₃	10² * Mass Fraction w₃	Chemical₄	10² * Mass Fraction w₄	Chemical₅	10² * Mass Fraction w₅	Chemical₆	10² * Mass Fraction w₆
1	Ca2+	1.23	NH4+	4.93	H+	1.51	NO3-	5.19	PO43-	56.87	H2O	30.26
2	Ca2+	2.38	NH4+	4.79	H+	1.09	NO3-	9.75	PO43-	42.70	H2O	39.29
3	Ca2+	2.55	NH4+	4.75	H+	1.07	NO3-	9.83	PO43-	42.26	H2O	39.55
4	Ca2+	2.72	NH4+	5.24	H+	0.99	NO3-	14.21	PO43-	38.53	H2O	38.31
5	Ca2+	2.75	NH4+	6.77	H+	0.94	NO3-	23.42	PO43-	35.26	H2O	30.87
6	Ca2+	3.34	NH4+	6.01	H+	0.75	NO3-	21.97	PO43-	29.39	H2O	38.54
7	Ca2+	3.54	NH4+	7.66	H+	0.64	NO3-	31.79	PO43-	24.26	H2O	32.11
8	Ca2+	4.05	NH4+	7.88	H+	0.45	NO3-	36.03	PO43-	17.41	H2O	34.17
9	Ca2+	4.05	NH4+	8.74	H+	0.42	NO3-	39.81	PO43-	16.28	H2O	30.69

Part 2. The compiler has used the data in Part 1 to calculate the following values: Values expressed as 100w_i.
Solution number	Chemical₁	m₁ [mol/kg]	Chemical₂	m₂ [mol/kg]	Chemical₃	m₃ [mol/kg]	Chemical₄	m₄ [mol/kg]	Chemical₅	m₅ [mol/kg]	Chemical₆	Mole Fraction₆^(a)
1	Ca2+	1.01	NH4+	9.57	H+	49.85	NO3-	2.72	PO43-	19.58	H2O	90.4
2	Ca2+	1.51	NH4+	7.16	H+	27.71	NO3-	3.94	PO43-	11.32	H2O	146.6
3	Ca2+	1.61	NH4+	7.05	H+	27.07	NO3-	3.94	PO43-	11.13	H2O	148.8
4	Ca2+	1.77	NH4+	8.03	H+	25.73	NO3-	5.88	PO43-	10.48	H2O	148.9
5	Ca2+	2.22	NH4+	12.87	H+	30.41	NO3-	12.04	PO43-	11.90	H2O	116.4
6	Ca2+	2.16	NH4+	9.16	H+	19.39	NO3-	9.04	PO43-	7.94	H2O	169.0
7	Ca2+	2.75	NH4+	14.00	H+	19.81	NO3-	15.71	PO43-	7.87	H2O	141.3
8	Ca2+	2.96	NH4+	13.55	H+	13.19	NO3-	16.74	PO43-	5.31	H2O	170.1
9	Ca2+	3.30	NH4+	16.73	H+	13.84	NO3-	20.58	PO43-	5.53	H2O	149.5

Notes:
   Table 1  ^a  The composition uniti are: mol/100 mol solute.

Method/Apparatus/Procedure:
   Nothing is stated but it is probably the same as described earlier.¹

Source and Purity of Materials:
   No information is given.

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

References:
   ¹Flatt, R.; Brunisholz, G.; Lauber, E. Helv. Chim. Acta 1956, 36, 1971.