SDS Volume
Volume 66. Ammonium Phosphates, p None
Source Publication
Vol'fkovich, S. I.; Berlin, L. E.; Mantsev, B. M.; Tr. NIUIFa 1940, 228.
Conditions:
Room Temp: Composition at 25 °C
Compilers:
Methodology:
The isothermal method was used. Equilibration required four to five days. The composition of the solid phases was determined by the Schreinemakers method. More experimental details have been described previously [1].
Sample Information:
- No information is given.
Measurement Errors:
Ambient temperature: The temperature was kept constant within ±0.05 K. No other information is given.
Mass concentration (m/v) (1): No information given.
Methodology Citation
1 Berlin, L. E.; Mantsev, B. M.; Zh. Prikl. Khim. 1933, 6, 385.
System Components:
- Ammonium dihydrogenphosphate, $\ce{ NH4H2PO4 }$; [7722-76-1] NIST WebBook
- Ammonium sulfate, $\ce{ (NH4)2SO4 }$; [7783-20-2] NIST WebBook
- Water, $\ce{ H2O }$; [7732-18-5] NIST WebBook
Experimental Data
| 100w1 | w2 | 100w3 | g1/100 g H2O (g1/100 g2) | g2/100 g H2O (g1/100 g2) | m1 (mol/kg) a | m2 (mol/kg) a | Phase (s) () b |
|---|---|---|---|---|---|---|---|
| 29.23a | 0.00a | 70.77 | 41.30 | 0.00 | 3.59 | 0.00 | A |
| 28.67 | 2.23 | 69.10 | 40.20 | 2.28 | 3.61 | 0.24 | A |
| 27.43 | 5.56 | 67.01 | 37.80 | 5.89 | 3.56 | 0.63 | A |
| 25.15 | 11.19 | 63.66 | 33.60 | 12.60 | 3.43 | 1.33 | A |
| 23.49 | 16.94 | 59.57 | 30.70 | 20.40 | 3.43 | 2.15 | A |
| 21.57 | 23.95 | 54.48 | 27.50 | 21.50 | 3.44 | 3.33 | A |
| 20.0 | 23.95 | 56.05 | 25.00 | 31.50 | 3.10 | 3.23 | A |
| 20.0 | 28.72 | 51.28 | 25.00 | 40.30 | 3.39 | 4.24 | A + B |
| 18.10 | 34.25 | 47.65 | 22.10 | 52.10 | 3.30 | 5.44 | B |
| 16.04 | 42.92 | 41.04 | 19.10 | 75.20 | 3.40 | 7.91 | B |
| 9.34 | 43.37 | 47.29 | 10.30 | 76.60 | 1.72 | 6.94 | B |
| 5.02 | 43.57 | 51.41 | 5.29 | 77.20 | 0.85 | 6.41 | B |
(a) These values were calculated by the compilers.
(b) The solid phases are: A = NH4H2PO4; B = (NH4)2SO4.
