Home
Introduction
Search Menu
IUPAC Series (PDF)
Reference
Version History
About the Project
Disclaimer
Contact Us
Acknowledgements
IUPAC-NIST Solubility Database
NIST Standard Reference Database 106
Solubility System:
Ammonia with Triphosphoric acid and Water
Components:
(1) Ammonia; NH3; [7664-41-7]
NIST Chemistry WebBook
for detail
(2) Triphosphoric acid; H5P3O10; [10380-08-2]
NIST Chemistry WebBook
for detail
(3) Water; H2O; [7732-18-5]
NIST Chemistry WebBook
for detail
Original Measurements:
Farr, T.D.; Fleming, J.D.; Hatfield, J.D., J. Chem. Eng. Data 1967, 12, 141.
Variables:
Concentration = Composition at 273 K and 298.3 K.
Prepared By:
J. Eysseltová
Experimental Data:
(Notes on the Nomenclature)
(Please see footnotes following the table(s).)
Solubility in the NH
3
-H
5
P
3
O
10
-H
2
O system at 273 K.
pH
Chemical
1
10
2
* Mass Fraction w
1
Chemical
2
10
2
* Mass Fraction w
2
Chemical
3
10
2
* Mass Fraction w
3
m
3
[mol/kg]
Chemical
4
10
2
* Mass Fraction w
4
m
4
[mol/kg]
Chemical
5
10
2
* Mass Fraction w
5
Solid Phase(s)
(b)
8.30
N
8.36
P2O5
25.33
NH3 (a)
10.16
10.09
H5P3O10 (a)
30.69
2.02
H2O (a)
59.15
A
5.90
N
9.04
P2O5
30.52
NH3 (a)
10.99
12.40
H5P3O10 (a)
36.98
2.76
H2O (a)
52.03
A
5.53
N
9.42
P2O5
33.68
NH3 (a)
11.45
14.09
H5P3O10 (a)
40.81
3.32
H2O (a)
47.74
A
5.35
N
9.83
P2O5
35.69
NH3 (a)
11.95
15.66
H5P3O10 (a)
43.24
3.74
H2O (a)
44.81
A + C
5.19
N
9.75
P2O5
36.66
NH3 (a)
11.85
15.92
H5P3O10 (a)
44.42
3.94
H2O (a)
43.73
C
4.95
N
9.86
P2O5
37.69
NH3 (a)
11.99
16.62
H5P3O10 (a)
45.67
4.18
H2O (a)
42.34
C
4.93
N
9.75
P2O5
38.09
NH3 (a)
11.85
16.57
H5P3O10 (a)
46.15
4.26
H2O (a)
42.00
D
4.41
N
9.61
P2O5
40.16
NH3 (a)
11.68
17.30
H5P3O10 (a)
48.66
4.76
H2O (a)
39.66
D
4.00
N
9.68
P2O5
43.41
NH3 (a)
11.77
19.39
H5P3O10 (a)
52.60
5.72
H2O (a)
35.63
D
3.72
N
9.73
P2O5
44.35
NH3 (a)
11.83
20.17
H5P3O10 (a)
53.73
6.04
H2O (a)
34.44
D + E
3.13
N
8.80
P2O5
42.66
NH3 (a)
10.70
16.70
H5P3O10 (a)
51.69
5.32
H2O (a)
37.61
E
2.51
N
8.38
P2O5
42.36
NH3 (a)
10.19
15.54
H5P3O10 (a)
51.32
5.16
H2O (a)
38.49
E
8.72
N
9.30
P2O5
26.30
NH3 (a)
11.31
11.68
H5P3O10 (a)
31.87
2.18
H2O (a)
56.82
A
7.88
N
9.39
P2O5
28.49
NH3 (a)
11.42
12.40
H5P3O10 (a)
34.52
2.48
H2O (a)
54.06
A
7.80
N
9.39
P2O5
28.45
NH3 (a)
11.42
12.39
H5P3O10 (a)
34.47
2.46
H2O (a)
54.11
A
6.38
N
9.65
P2O5
31.15
NH3 (a)
11.73
13.63
H5P3O10 (a)
37.74
2.90
H2O (a)
50.53
A + B
6.25
N
9.69
P2O5
32.01
NH3 (a)
11.78
13.99
H5P3O10 (a)
38.78
3.04
H2O (a)
49.43
B
6.02
N
9.72
P2O5
32.43
NH3 (a)
11.82
14.19
H5P3O10 (a)
39.29
3.12
H2O (a)
48.89
B
5.58
N
10.00
P2O5
35.39
NH3 (a)
12.16
15.88
H5P3O10 (a)
42.88
3.70
H2O (a)
44.96
B
5.57
N
10.30
P2O5
36.56
NH3 (a)
12.52
17.03
H5P3O10 (a)
44.30
3.98
H2O (a)
43.18
B
5.54
N
10.30
P2O5
36.52
NH3 (a)
12.52
17.01
H5P3O10 (a)
44.25
3.96
H2O (a)
43.23
B
5.12
N
10.40
P2O5
39.79
NH3 (a)
12.65
18.97
H5P3O10 (a)
48.21
4.78
H2O (a)
39.14
C
Notes:
Table 1
a
These values were calculated by the compiler.
Table 2
b
The solid phases are: A=(NH
4
)
5
P
3
O
10
·H
2
O; B=(NH
4
)
5
P
3
O
10
·H
2
O; C=(NH
4
)
9
H(P
3
O
10
)·2H
2
O; D=(NH
4
)
4
H
2
P
3
O
10
; E=(NH
4
)
3
H
2
P
3
O
10
.
Method/Apparatus/Procedure:
The complexes, in capped plastic bottles, were equilibrated isothermally in a cold room or in a water bath. The approach to equilibrium was followed by periodic petrographic and X-ray examination of the solid phases and by determination of composition and pH of the liquid phase. Phosphorus was determined gravimetrically as quinolinium molybdophosphate
1
, and nitrogen was determined by distillation of ammonia with NaOH.
Source and Purity of Materials:
The ammonium tripolyphosphates and their solutions were prepared by ammoniation and vacuum evaporation of 0.3 N tripolyphosphoric acid that had been prepared by ion exchange from solutions of recrystallized Na
5
P
3
O
10
. All operations were carried out at temperatures below 10 °C. Techniques similar to those used in preparing crystalline ammonium pyrophosphates
2
were used to prepare ammonium tripolyphosphates.
Estimated Errors:
Temperature: The only information given is that the temperature control was as follows: 273 ± 0.5 K and 298.30 ± 0.05 K.
References:
1
C. H. Perrin, J. Assoc. Offic. Agr. Chemists
41
, 758 (1958).
2
T. D. Farr and J. D. Fleming, J. Chem. Eng. Data
10
, 20 (1965).