SDS Volume (2943)
Volume 66. Ammonium Phosphates, p None
Original Measurements
Voogd, M.; Over de Bereiding von Mono- en Diammoniumphosphaat. (Technical Univisity Delft--in honor of P. E. C. Scheffer) quoted in Gmelins Handbuch der anorganischen Chemie, 8th ed.; 1936, Springer 1974, p. 419.
Variables:
Temperature and composition.
Prepared by:
Method/Apparatus/Procedure:
No information is given.
Source and Purity of Materials:
- No information is given.
Estimated Errors:
Ambient temperature: No information is given.
Mass concentration (m/v) (1): No information is given.
References
1 Gmelins Handbuch der anorganischen Chemie, 8th ed., 1934, Springer, p. 419 (1974).
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
Solubility in the NH4H2PO4-(NH4)2HPO4-H2O system.
| $T$ (°C) | 100w3 | 100w4 | 100w5 | m1 (mol/kg) | m2 (mol/kg) | m3 (mol/kg) | m4 (mol/kg) | Phase (s) () |
|---|---|---|---|---|---|---|---|---|
| 60 | 14.1 | 56.1 | 29.8 | 8.29 | 5.72 | 27.8 | 19.2 | A + B |
| 55 | 13.8 | 54.9 | 31.3 | 8.13 | 5.60 | 26.0 | 17.9 | A + B |
| 50 | 13.6 | 53.6 | 32.8 | 7.97 | 5.47 | 24.3 | 16.7 | A + B |
| 45 | 13.3 | 52.0 | 34.7 | 7.78 | 5.31 | 22.4 | 15.3 | A + B |
| 40 | 13.0 | 50.8 | 36.2 | 7.64 | 5.18 | 21.1 | 14.3 | A + B |
| 60 | 12.6 | 51.2 | 36.3 | 7.39 | 5.22 | 20.4 | 14.4 | A |
| 55 | 9.76 | 44.4 | 45.8 | 5.73 | 4.53 | 12.5 | 9.88 | A |
| 60 | 14.0 | 54.3 | 31.7 | 8.20 | 5.54 | 25.8 | 17.4 | B |
| 55 | 12.8 | 45.6 | 41.7 | 7.49 | 4.65 | 18.0 | 11.2 | B |
(a) The composition units are: mol/1000 g solution.
(b) All these data were calculated by the compiler
(c) The solid phases are: A = NH4H3PO4; B = (NH4)2HPO4.
