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.; Fell. M., Helv. Chim. Acta 1956, 39, 1130.

Variables:

   Concentration = Composition at 25 ºC

Prepared By:
   J. Eysseltová

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

Table I. Composition of solutions saturated simultaneously with Ca(H₂PO₄)₂·H₂O, CaHPO₄·2H₂O, Ca₉(NH₄)₄H₃₂PO₄)₁₈&#
Solution number	Chemical₁	Solubility₁ [eq %]	Chemical₂	Solubility₂ [eq %]	Chemical₃	Solubility₃ [eq %]	Chemical₄	Solubility₄ [eq %]	Chemical₅	Solubility₅ [eq %]	Chemical₆	Mole Fraction₆^(a)
1	Ca2+	29.60	NH4+	57.50	H+	12.90	NO3-	84.40	PO43-	15.60	H2O	148.6
2	Ca2+	27.70	NH4+	56.70	H+	15.60	NO3-	81.30	PO43-	18.70	H2O	142.8
3	Ca2+	25.70	NH4+	58.90	H+	15.40	NO3-	81.60	PO43-	18.40	H2O	151.7
4 (b)	Ca2+	27.70	NH4+	57.70	H+	14.60	NO3-	82.40	PO43-	17.60	H2O	147.7

Table II. Composition of solutions saturated simultaneously with Ca(H₂PO₄)₂.H₂O, CaHPO₄·₂H₂O and Ca₉(NH₄)₄H₃₂(PO₄)
Solution number	Chemical₁	Solubility₁ [eq %]	Chemical₂	Solubility₂ [eq %]	Chemical₃	Solubility₃ [eq %]	Chemical₄	Solubility₄ [eq %]	Chemical₅	Solubility₅ [eq %]	Chemical₆	Mole Fraction₆^(a)
5	Ca2+	30.80	NH4+	51.30	H+	17.90	NO3-	78.20	PO43-	21.80	H2O	190.7
6	Ca2+	32.50	NH4+	45.50	H+	22.00	NO3-	73.20	PO43-	26.80	H2O	221.7
7	Ca2+	34.70	NH4+	37.30	H+	28.00	NO3-	65.60	PO43-	34.40	H2O	267.0
8	Ca2+	36.20	NH4+	34.60	H+	29.20	NO3-	63.10	PO43-	36.90	H2O	312.9
9	Ca2+	35.40	NH4+	30.70	H+	33.90	NO3-	57.20	PO43-	42.80	H2O	319.1
10	Ca2+	33.80	NH4+	26.10	H+	40.10	NO3-	49.20	PO43-	50.80	H2O	333.8
11	Ca2+	33.30	NH4+	23.80	H+	42.90	NO3-	45.70	PO43-	54.30	H2O	330.2
12	Ca2+	31.80	NH4+	20.30	H+	47.90	NO3-	39.40	PO43-	60.60	H2O	330.1
13	Ca2+	27.50	NH4+	17.40	H+	55.10	NO3-	30.10	PO43-	69.90	H2O	322.7
14	Ca2+	25.80	NH4+	15.80	H+	58.40	NO3-	26.10	PO43-	73.90	H2O	317.7
15	Ca2+	25.10	NH4+	25.50	H+	59.40	NO3-	24.60	PO43-	75.40	H2O	314.7
16	Ca2+	23.30	NH4+	14.30	H+	62.40	NO3-	21.10	PO43-	78.90	H2O	305.1
17	Ca2+	22.00	NH4+	13.90	H+	64.10	NO3-	28.80	PO43-	81.20	H2O	298.0
18	Ca2+	21.00	NH4+	13.20	H+	65.80	NO3-	17.00	PO43-	83.00	H2O	294.0
19	Ca2+	19.90	NH4+	12.40	H+	67.70	NO3-	14.70	PO43-	85.30	H2O	287.6

Part 2. The compiler has used the data in Part 1 to calculate the following concentration values. Values expressed as 100w_i.
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+	5.89	NH4+	9.72	H+	0.13	NO3-	52.78	PO43-	4.85	H2O	26.54
2	Ca2+	5.65	NH4+	9.82	H+	0.16	NO3-	52.13	PO43-	6.09	H2O	26.15
3	Ca2+	5.15	NH4+	10.04	H+	0.15	NO3-	51.45	PO43-	5.89	H2O	27.32
4	Ca2+	5.57	NH4+	9.86	H+	0.15	NO3-	52.10	PO43-	5.65	H2O	26.67
5	Ca2+	5.84	NH4+	8.27	H+	0.17	NO3-	46.64	PO43-	6.60	H2O	32.48
6	Ca2+	5.97	NH4+	7.10	H+	0.20	NO3-	42.29	PO43-	7.86	H2O	36.58
7	Ca2+	6.10	NH4+	5.57	H+	0.25	NO3-	36.27	PO43-	9.66	H2O	42.16
8	Ca2+	5.98	NH4+	4.86	H+	0.24	NO3-	32.77	PO43-	9.73	H2O	46.42
9	Ca2+	5.92	NH4+	4.36	H+	0.28	NO3-	30.08	PO43-	11.43	H2O	47.93
10	Ca2+	5.69	NH4+	3.74	H+	0.34	NO3-	26.06	PO43-	13.66	H2O	50.51
11	Ca2+	5.72	NH4+	3.47	H+	0.37	NO3-	24.66	PO43-	14.88	H2O	50.90
12	Ca2+	5.59	NH4+	3.03	H+	0.42	NO3-	21.79	PO43-	17.02	H2O	52.14
13	Ca2+	5.08	NH4+	2.73	H+	0.51	NO3-	17.49	PO43-	20.63	H2O	53.56
14	Ca2+	4.89	NH4+	2.54	H+	0.55	NO3-	15.56	PO43-	22.37	H2O	54.09
15	Ca2+	4.81	NH4+	2.52	H+	0.57	NO3-	14.83	PO43-	23.08	H2O	54.19
16	Ca2+	4.61	NH4+	2.41	H+	0.62	NO3-	13.14	PO43-	24.95	H2O	54.27
17	Ca2+	4.46	NH4+	2.39	H+	0.65	NO3-	11.98	PO43-	26.28	H2O	54.24
18	Ca2+	4.32	NH4+	2.31	H+	0.68	NO3-	11.01	PO43-	27.29	H2O	54.38
19	Ca2+	4.19	NH4+	2.22	H+	0.71	NO3-	9.74	PO43-	28.70	H2O	54.43

Part 2. The compiler has used the data in Part 1 to calculated the following concentration values. Values are expressed at m_i / mol kg^–1 H₂O.
Solution number	Chemical₁	m₁ [mol/kg]	Chemical₂	m₂ [mol/kg]	Chemical₃	m₃ [mol/kg]	Chemical₄	m₄ [mol/kg]	Chemical₅	m₅ [mol/kg]
1	Ca2+	5.53	NH4+	21.50	H+	4.82	NO3-	31.55	PO43-	1.94
2	Ca2+	5.39	NH4+	22.06	H+	6.07	NO3-	31.63	PO43-	2.43
3	Ca2+	4.71	NH4+	21.57	H+	5.64	NO3-	29.88	PO43-	2.25
4	Ca2+	5.21	NH4+	21.70	H+	5.49	NO3-	30.99	PO43-	2.21
5	Ca2+	4.49	NH4+	14.94	H+	5.21	NO3-	22.78	PO43-	2.12
6	Ca2+	4.07	NH4+	11.40	H+	5.51	NO3-	18.34	PO43-	2.24
7	Ca2+	3.61	NH4+	7.76	H+	5.83	NO3-	13.65	PO43-	2.39
8	Ca2+	3.21	NH4+	6.14	H+	5.18	NO3-	11.20	PO43-	2.18
9	Ca2+	3.08	NH4+	5.34	H+	5.90	NO3-	9.96	PO43-	2.48
10	Ca2+	2.81	NH4+	4.34	H+	6.67	NO3-	8.19	PO43-	2.82
11	Ca2+	2.80	NH4+	4.00	H+	7.22	NO3-	7.69	PO43-	3.05
12	Ca2+	2.68	NH4+	3.42	H+	8.06	NO3-	6.63	PO43-	3.40
13	Ca2+	2.37	NH4+	3.00	H+	9.49	NO3-	5.18	PO43-	4.01
14	Ca2+	2.26	NH4+	2.76	H+	10.21	NO3-	4.56	PO43-	4.31
15	Ca2+	2.22	NH4+	2.74	H+	10.49	NO3-	4.34	PO43-	4.44
16	Ca2+	2.12	NH4+	2.60	H+	11.36	NO3-	3.84	PO43-	4.79
17	Ca2+	2.05	NH4+	2.59	H+	11.95	NO3-	3.50	PO43-	5.05
18	Ca2+	1.98	NH4+	2.49	H+	12.43	NO3-	3.21	PO43-	5.23
19	Ca2+	1.92	NH4+	2.40	H+	13.08	NO3-	2.84	PO43-	5.49

Notes:
   Table 1  ^b  This is the average of soln nos. 1 to 3.
   Table 2  ^a  The water content is expressed as mol/100 mol solute.

Method/Apparatus/Procedure:
   No information is given.

Source and Purity of Materials:
   No information is given.

Estimated Errors:

   Temperature: No information is given. The compiler estimates the reproducibility to be about 5 %.