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.; Clerc, F., Helv. Chim. Acta 1952, 35, 336.

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. Solutions coexisting with Ca(H₂PO₄)₂·H₂O and NH₄H₂PO₄.
Solution number	Chemical₁	Solubility₁ [eq %]	Chemical₂	Solubility₂ [eq %]	Chemical₃	Solubility₃ [eq %]	Chemical₄	Solubility₄ [eq %]	Chemical₅	Solubility₅ [eq %]	Chemical₆	Mole Fraction₆^(a)
1	Ca2+	19.3	NH4+	44.0	H+	36.7	NO3-	55.4	PO43-	44.6	H2O	173.2
2	Ca2+	18.5	NH4+	41.2	H+	40.3	NO3-	49.9	PO43-	50.1	H2O	206.2
3	Ca2+	8.5	NH4+	32.9	H+	58.6	NO3-	33.2	PO43-	66.8	H2O	106.0
4	Ca2+	13.0	NH4+	28.8	H+	58.2	NO3-	29.1	PO43-	70.9	H2O	160.0
5	Ca2+	5.1	NH4+	27.0	H+	67.9	NO3-	23.0	PO43-	77.0	H2O	57.8
6	Ca2+	7.8	NH4+	26.4	H+	65.8	NO3-	23.5	PO43-	76.5	H2O	96.5

Table II. Solutions coexisting with Ca(H₂PO₄)₂·H₂O, NH₄H₂PO₄ and NH₄NO₃.
Solution number	Chemical₁	Solubility₁ [eq %]	Chemical₂	Solubility₂ [eq %]	Chemical₃	Solubility₃ [eq %]	Chemical₄	Solubility₄ [eq %]	Chemical₅	Solubility₅ [eq %]	Chemical₆	Mole Fraction₆^(a)	Solid Phase(s)^(b)
7	Ca2+	1.5	NH4+	20.5	H+	78.0	NO3-	11.9	PO43-	88.1	H2O	19.4	A + B + C + D
8	Ca2+	2.2	NH4+	22.2	H+	75.6	NO3-	14.4	PO43-	85.6	H2O	33.4	A + B + C
9	Ca2+	3.3	NH4+	24.1	H+	72.6	NO3-	17.8	PO43-	82.2	H2O	45.0	A + B + C
10	Ca2+	4.9	NH4+	26.8	H+	68.3	NO3-	22.7	PO43-	77.3	H2O	55.4	A + B + C
11	Ca2+	8.4	NH4+	32.9	H+	58.7	NO3-	33.1	PO43-	66.9	H2O	77.0	A + B + C
12	Ca2+	11.2	NH4+	37.7	H+	51.1	NO3-	42.0	PO43-	58.0	H2O	91.4	A + B + C
13	Ca2+	14.6	NH4+	44.2	H+	41.2	NO3-	52.4	PO43-	47.6	H2O	111.7	A + B + C
14	Ca2+	17.4	NH4+	48.4	H+	34.2	NO3-	59.5	PO43-	40.5	H2O	118.3	A + B + C
15	Ca2+	20.9	NH4+	55.7	H+	23.4	NO3-	72.2	PO43-	27.8	H2O	144.1	A + B + C
16	Ca2+	21.6	NH4+	56.5	H+	21.9	NO3-	73.8	PO43-	26.2	H2O	143.3	A + B + C + E
17c	Ca2+	22.0	NH4+	57.9	H+	20.1	NO3-	75.5	PO43-	24.5	H2O	148.0	A + B + C
18c	Ca2+	21.9	NH4+	59.0	H+	19.1	NO3-	77.2	PO43-	22.9	H2O	148.1	A + B + C

Part 2.The compiler has used the data in Tables I and II to calculate the following 100w_i values.
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+	4.2	NH4+	8.1	H+	0.4	NO3-	37.9	PO43-	15.5	H2O	33.9
2	Ca2+	3.9	NH4+	7.3	H+	0.4	NO3-	32.9	PO43-	16.7	H2O	38.8
3	Ca2+	2.5	NH4+	8.1	H+	0.8	NO3-	30.2	PO43-	30.9	H2O	27.5
4	Ca2+	3.3	NH4+	6.3	H+	0.7	NO3-	23.5	PO43-	29.1	H2O	37.0
5	Ca2+	1.8	NH4+	8.2	H+	1.2	NO3-	26.0	PO43-	44.1	H2O	18.6
6	Ca2+	2.5	NH4+	7.1	H+	1.0	NO3-	23.4	PO43-	38.6	H2O	27.4
7	Ca2+	0.7	NH4+	8.0	H+	1.8	NO3-	17.1	PO43-	64.4	H2O	8.0
8	Ca2+	0.9	NH4+	8.0	H+	1.6	NO3-	19.1	PO43-	57.7	H2O	12.7
9	Ca2+	1.3	NH4+	8.0	H+	1.4	NO3-	21.9	PO43-	51.5	H2O	15.8
10	Ca2+	1.8	NH4+	8.3	H+	1.2	NO3-	25.9	PO43-	44.8	H2O	18.1
11	Ca2+	2.6	NH4+	8.8	H+	0.9	NO3-	32.6	PO43-	33.4	H2O	21.7
12	Ca2+	3.2	NH4+	9.1	H+	0.7	NO3-	37.5	PO43-	26.3	H2O	23.3
13	Ca2+	3.7	NH4+	9.5	H+	0.5	NO3-	41.7	PO43-	19.2	H2O	25.4
14	Ca2+	4.2	NH4+	9.8	H+	0.4	NO3-	44.7	PO43-	15.5	H2O	25.4
15	Ca2+	4.4	NH4+	10.1	H+	0.2	NO3-	48.3	PO43-	9.4	H2O	27.5
16	Ca2+	4.6	NH4+	10.1	H+	0.2	NO3-	49.0	PO43-	8.8	H2O	27.2
17	Ca2+	4.6	NH4+	10.2	H+	0.2	NO3-	49.3	PO43-	8.1	H2O	27.6
18	Ca2+	4.5	NH4+	10.3	H+	0.2	NO3-	50.0	PO43-	7.5	H2O	27.4

The compiler has used the data in Tables I and II to calculate the following molalities as mol/kg H₂O values.
Solution number	Chemical₁	m₁ [mol/kg]	Chemical₂	m₂ [mol/kg]	Chemical₃	m₃ [mol/kg]	Chemical₄	m₄ [mol/kg]	Chemical₅	m₅ [mol/kg]
1	Ca2+	3.1	NH4+	14.4	H+	11.8	NO3-	17.8	PO43-	4.8
2	Ca2+	2.5	NH4+	11.1	H+	10.9	NO3-	13.4	PO43-	4.5
3	Ca2+	2.2	NH4+	17.2	H+	30.7	NO3-	17.4	PO43-	11.7
4	Ca2+	2.3	NH4+	10.0	H+	20.2	NO3-	10.1	PO43-	8.2
5	Ca2+	2.5	NH4+	26.0	H+	65.3	NO3-	22.1	PO43-	24.7
6	Ca2+	2.2	NH4+	15.2	H+	37.9	NO3-	13.5	PO43-	14.7
7	Ca2+	2.1	NH4+	58.7	H+	223.4	NO3-	34.1	PO43-	84.1
8	Ca2+	1.8	NH4+	36.9	H+	125.7	NO3-	24.0	PO43-	47.5
9	Ca2+	2.0	NH4+	29.8	H+	89.6	NO3-	22.0	PO43-	33.8
10	Ca2+	2.5	NH4+	26.9	H+	68.5	NO3-	22.8	PO43-	25.8
11	Ca2+	3.0	NH4+	23.7	H+	42.4	NO3-	23.9	PO43-	16.1
12	Ca2+	3.4	NH4+	22.9	H+	31.1	NO3-	25.5	PO43-	11.8
13	Ca2+	3.6	NH4+	22.0	H+	20.5	NO3-	26.1	PO43-	7.9
14	Ca2+	4.1	NH4+	22.7	H+	16.1	NO3-	27.9	PO43-	6.3
15	Ca2+	4.0	NH4+	21.5	H+	9.0	NO3-	27.8	PO43-	3.6
16	Ca2+	4.2	NH4+	21.9	H+	8.5	NO3-	28.6	PO43-	3.4
17	Ca2+	4.1	NH4+	21.7	H+	7.5	NO3-	28.3	PO43-	3.1
18	Ca2+	4.1	NH4+	22.1	H+	7.2	NO3-	29.0	PO43-	2.9

Notes:
   Table 2  ^a  The content is expressed as: mol/100 mol solute.
   Table 2  ^b  The solid phases are: A=Ca(H₂PO₄)₂·H₂O; B=NH₄H₂PO₄; C=NH₄NO₃; D=(NH₄)₃H₉(PO₄)₄; E=Ca₉(NH₄)₄H₃₂(PO₄)₁₈·10H₂O;
   Table 2  ^c  This was a metastable equilibrium.

Method/Apparatus/Procedure:
   No information is given.

Source and Purity of Materials:
   No information is given.

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