NIST-IUPAC Solubility Data Series

Compilation - Ammonia with Phosphoric acid and Water (IUPAC SDS Volume 66)

SDS Volume (2945)

Original Measurements

Muromtsev, B. A.; Kaliy 1937, 1, 36.
Muromtsev, B. A.; Nazarova, L. A.; Izv. Akad. Nauk USSR, otd. Estestv. i Mat. Nauk 1938, 177.

Variables:

Room Temp: Composition at 273, 298 and 323 $\pu{K}$

Prepared by:

J. Eysseltová, L.V. Chernykh

Method/Apparatus/Procedure:

The isothermal method was used. The composition of the solid phases was determined microscopically and with the use of the Schreinemakers method.

Source and Purity of Materials:

Chemically pure ammonia and analytical reagent grade $\ce{H3PO4}$ were used. The materials were purified by repeated freezing.

Estimated Errors:

Ambient temperature: The temperature was kept constant within 0.05 K.

Components:

Ammonia, $\ce{ NH3 }$; [7664-41-7] NIST WebBook
Phosphoric acid, $\ce{ H3PO4 }$; [7664-38-2] NIST WebBook
Water, $\ce{ H2O }$; [7732-18-5] NIST WebBook

Experimental Data

Remarks: ADDITIONAL DATA: In source paper 1 the composition of the solution saturated simultaneously with NH₄H₂PO₄ and (NH₄)₂HPO₄ at 323 K is reported as 13.81 mass % NH₃ (24.72 mol kg^-1 --compilers) and 53.37 mass % H₃PO₄ (8.36 mol kg^-1--compilers).

Table I. Solubility in the NH₃-H₃PO₄-H₂O system at 0°C.

$T$ (°C)	100w₁	100w₂	100w₃	100w₄	100w₅	$x_{4}$	$x_{5}$	m₁ (mol/kg)	m₂ (mol/kg)	Phase (s) ()
0	23.71	0.070	76.22	36.25	0.05	0.1645	9 x 10^-5	18.27	9 x 10^-3	A
0	16.48	0.150	83.37	25.18	0.11	0.1044	1.7 x 10^-4	11.61	0.018	A
0	13.88	0.230	85.89	21.21	0.17	0.0853	2.5 x 10^-4	9.49	0.027	A
0	7.85	0.620	91.53	12.00	0.45	0.0453	6.2 x 10^-4	5.04	0.069	A
0	3.22	1.88	94.90	4.92	1.36	0.0178	1.8 x 10^-3	1.99	0.202	A
0	2.26	3.10	94.64	3.46	2.24	0.0125	3.0 x 10^-3	1.40	0.334	A
0	2.41	5.24	92.35	3.68	3.79	0.0135	5.1 x 10^-3	1.53	0.579	A
0	3.65	9.65	86.70	5.58	6.99	0.0214	9.8 x 10^-3	2.47	1.14	A
0	7.14	19.92	72.94	10.90	14.42	0.0470	0.0228	5.75	2.79	A
0	7.78	21.81	70.41	11.89	15.80	0.0525	0.0256	6.49	3.16	A
0	8.18	22.92	68.90	12.50	16.60	0.0559	0.0272	6.97	3.39	A
0	8.35	23.50	68.15	12.76	17.02	0.0575	0.0281	7.19	3.52	A
0	9.34	26.56	64.10	14.28	19.22	0.0668	0.0330	8.56	4.23	A + B
0	9.97	32.35	57.68	15.23	23.43	0.0757	0.0427	10.15	5.72	B
0	10.12	33.26	56.62	15.49	24.07	0.0778	0.0443	10.50	5.99	B
0	10.71	37.84	51.45	16.39	27.40	0.0868	0.0532	12.22	7.50	B
0	11.14	41.06	47.80	17.04	29.75	0.0937	0.0600	13.68	8.77	B + C
0	8.60	33.76	57.64	13.14	24.45	0.0649	0.0443	8.76	5.98	C
0	6.32	27.02	66.66	9.67	19.59	0.0436	0.0324	5.57	4.14	C
0	3.89	19.37	76.74	5.95	14.03	0.0245	0.0212	2.98	2.58	C
0	3.52	17.98	78.50	5.38	13.02	0.0219	0.0194	2.63	2.34	C
0	3.07	16.65	80.28	4.69	12.03	0.0188	0.0176	2.25	2.12	C
0	2.85	18.69	78.46	4.35	13.52	0.0176	0.0201	2.13	2.43	C
0	2.90	21.19	75.91	4.43	15.34	0.0183	0.0232	2.24	2.85	C
0	3.00	24.25	72.75	4.59	17.57	0.0194	0.0273	2.42	3.40	C
0	3.52	61.96	34.52	5.38	44.90	0.0324	0.0994	5.99	18.32	C
0	3.50	69.46	27.04	5.35	50.27	0.0352	0.1210	7.60	26.21	C + D
0	3.54	71.09	25.37	5.41	51.50	0.0364	0.1269	8.19	28.59	D
0	3.25	71.80	24.95	4.97	52.00	0.0335	0.1285	7.65	29.36	D
0	2.70	74.54	22.76	4.13	54.00	0.0285	0.1362	6.97	33.42	D
0	2.96	77.00	20.04	4.52	55.80	0.0324	0.1465	8.67	39.21	D
0	2.82	79.22	17.96	4.31	57.35	0.0317	0.1544	9.22	45.01	D
0	3.40	83.93	12.67	5.20	60.75	0.0414	0.1768	15.76	67.59	D
0	3.52	84.55	11.93	5.38	61.25	0.0433	0.1806	17.33	72.32	E
0	2.92	86.36	10.72	4.46	62.50	0.0363	0.1865	15.99	82.20	F
0	1.71	82.93	15.36	2.61	60.06	0.0197	0.1659	6.54	55.09	F
25	4.31	34.09	61.60	6.59	24.69	0.0308	0.0422	4.11	5.65	C
25	4.25	27.20	68.55	6.50	19.70	0.0286	0.0318	3.64	4.05	C
25	4.18	25.09	70.73	6.59	18.18	0.0277	0.0289	3.47	3.62	C
25	4.34	24.46	71.20	6.64	17.72	0.0287	0.0280	3.58	3.51	C
25	4.48	24.92	70.60	6.85	18.05	0.0295	0.0287	3.73	3.60	C
25	2.93	25.94	71.13	7.54	18.79	0.0332	0.0303	2.42	3.72	C
25	8.55	36.50	54.95	13.05	26.44	0.0662	0.0491	9.14	6.78	C
25	5.22	81.40	13.38	7.98	58.96	0.0638	0.1727	22.91	62.08	C + E
25	3.27	87.44	9.29	5.00	63.33	0.0417	0.1940	20.67	96.04	E
25	2.90	88.93	8.17	4.43	64.41	0.0374	0.2011	20.84	111.1	E
50	12.26	3.01	84.73	18.76	2.18	0.0756	3.2 x 10^-3	8.50	0.362	A
50	9.35	8.80	81.85	14.31	6.38	0.0582	9.5 x 10^-3	6.71	1.10	A
50	8.97	14.10	76.93	13.72	10.21	0.0578	0.0158	6.85	1.87	A
50	9.33	18.05	72.62	14.27	13.08	0.0623	0.0209	7.54	2.54	A
50	11.18	29.02	59.80	17.11	21.02	0.0840	0.0379	10.98	4.95	A
50	11.49	30.96	57.55	17.58	22.43	0.0883	0.0413	11.72	5.49	A + B
50	12.20	34.10	53.70	28.67	24.70	0.0975	0.0473	13.34	6.48	B
50	12.03	34.71	53.26	18.41	25.14	0.0965	0.0483	13.26	6.65	B
50	12.00	34.81	53.19	18.36	25.22	0.0961	0.0485	13.25	6.68	B
50	12.03	35.52	52.45	18.41	25.73	0.0973	0.0498	13.47	6.91	B
50	12.07	36.07	51.86	18.47	26.13	0.0982	0.0509	13.67	7.10	B
50	12.28	38.67	49.05	18.79	28.01	0.1041	0.0570	14.70	8.04	B
50	12.64	42.35	45.01	19.34	30.68	0.1105	0.0643	16.49	9.60	B
50	13.88	53.20	32.92	21.24	38.54	0.1401	0.0932	24.76	16.49	B + C
50	8.50	40.42	51.08	13.00	29.28	0.0681	0.0563	9.77	8.07	C
50	6.68	35.63	57.69	10.22	25.81	0.0499	0.0463	6.80	6.30	C
50	6.10	34.58	59.32	9.33	25.05	0.0448	0.0441	6.04	5.95	C
50	5.84	35.51	58.65	8.94	25.78	0.0431	0.0455	5.85	6.18	C
50	5.77	41.88	52.35	8.82	30.34	0.0450	0.0568	6.47	8.16	C
50	5.68	54.77	39.55	8.68	39.68	0.0503	0.0843	8.43	14.13	C
50	5.97	71.92	22.11	9.13	52.09	0.0650	0.1362	15.86	33.19	C
50	6.48	83.03	10.49	9.91	60.14	0.0836	0.1860	36.27	80.77	C
50	6.44	85.33	8.23	9.85	61.80	0.0860	0.1980	45.95	105.8	C
50	5.88	88.06	6.06	8.99	63.78	0.0809	0.2107	56.98	148.3	B + C
50	13.81	53.37	32.82	24.71	16.59	E

(a) These values were calculated by the compiler.

(b) The solid phases are: A = (NH₄)₃PO₄·3H₂O; B = (NH₄)₂HPO₄; C = NH₄H₂PO₄; D = NH₄H₅PO₄)₂·H₂:O E = NH₄H₅(PO₄)₂; F = 2H₃PO₄·H₂O.

IUPAC-NIST Solubility Data Series, SRD 106

Compilation - Ammonia with Phosphoric acid and Water (IUPAC SDS Volume 66)

SDS Volume (2945)

Original Measurements

Variables:

Prepared by:

Method/Apparatus/Procedure:

Source and Purity of Materials:

Estimated Errors:

Components:

Experimental Data

Table I. Solubility in the NH₃-H₃PO₄-H₂O system at 0°C.

Download Data

Compilation - Ammonia with Phosphoric acid and Water (IUPAC SDS Volume 66)

SDS Volume (2945)

Original Measurements

Variables:

Prepared by:

Method/Apparatus/Procedure:

Source and Purity of Materials:

Estimated Errors:

Components:

Experimental Data

Table I. Solubility in the NH3-H3PO4-H2O system at 0°C.

Download Data

Table I. Solubility in the NH₃-H₃PO₄-H₂O system at 0°C.