SDS Volume
Volume 66. Ammonium Phosphates, p None
Source Publication
Pozin, M. E.; Kopylev, B. A.; Shilling, N. A.; Zh. Prikl. Khim. 37, 2341 (1964).
Conditions:
Room Temp: Composition at 15 and 25 °C
Compiler:
Methodology:
A polythermic method was used [1]. Because of the tendency for supersaturation, the temperature of disappearance of the last crystal was observed. The experiments were performed in 250 mL glass vessels. The solutions were stirred at 900 rpm to 1200 rpm. The speed of heating was 1 deg/min. The compiler assumes that the isotherms were derived graphically from experimental results
Sample Information:
- Chemically pure salts were recrystallized two or three times before use.
Measurement Errors:
Ambient temperature: The mean relative error of the experiments was specified as 1.6%. The reproducibility of temperature measurements was 0.25 K.
Methodology Citation
1 Bergman, A. G.; Luzhnaya, N. P.; Fiziko-Khimicheskie Osnovy Izucheniya i Ispol'zovaniya Solyanykh Mestorozhdeniy Khlorid-Sul'fatnogo Tipa, Moscow, IAN USSR (1951).
System Components:
- Ammonium dihydrogenphosphate, $\ce{ NH4H2PO4 }$; [7722-76-1] NIST WebBook
- Ammonium nitrate, $\ce{ NH4NO3 }$; [6484-52-2] NIST WebBook
- Ammonium chloride, $\ce{ NH4Cl }$; [12125-02-9] NIST WebBook
- Potassium dihydrogenphosphate, $\ce{ KH2PO4 }$; [7778-77-0] NIST WebBook
- Potassium nitrate, $\ce{ KNO3 }$; [7757-79-1] NIST WebBook
- Potassium chloride, $\ce{ KCl }$; [7447-40-7] NIST WebBook
- Water, $\ce{ H2O }$; [7732-18-5] NIST WebBook
Experimental Data
| $T$ (°C) | 100w1 | g2/100 g solute (g1/100 g2) | g3/100 g solute (g1/100 g2) | g4/100 g solute (g1/100 g2) | g5/100 g solute (g1/100 g2) | g6/100 g solute (g1/100 g2) | g7/100 g solute (g1/100 g2) |
|---|---|---|---|---|---|---|---|
| 15 | 32 | 34.00a | 17.00a | 49.00a | 25.30a | 19.00a | 55.70a |
| 15 | 32 | 52.35 | 26.15 | 21.50 | 42.00 | 31.50 | 26.50 |
| 15 | 3E+1 | 62.00 | 31.00 | 7.00 | 51.00 | 38.00 | 11.00 |
| 15 | 3E+1 | 42.80 | 34.20 | 23.00 | 35.00 | 38.50 | 26.50 |
| 15 | 3E+1 | 35.00 | 35.00 | 30.0 | 29.00 | 37.90 | 33.10 |
| 15 | 3E+1 | 28.25 | 28.25 | 43.50 | 22.90 | 30.0 | 47.10 |
| 15 | 3E+1 | 30.55 | 24.45 | 45.00 | 23.80 | 26.40 | 49.80 |
| 15 | 28 | 49.70 | 39.80 | 10.50 | 41.65 | 45.95 | 12.50 |
| 15 | 28 | 41.75 | 51.75 | 16.50 | 35.30 | 46.10 | 18.60 |
| 15 | 28 | 27.85 | 44.65 | 27.50 | 25.40 | 45.80 | 28.8 |
| 15 | 28 | 24.20 | 38.80 | 37.00 | 22.00 | 39.50 | 38.5 |
| 15 | 28 | 23.00 | 23.00 | 54.00 | 18.40 | 24.10 | 57.50 |
| 15 | 28 | 20.55 | 16.45 | 63.00 | 16.50 | 17.00 | 66.50 |
| 15 | 28 | 16.68 | 13.32 | 70.0 | 12.50 | 13.75 | 73.75 |
| 15 | 28 | 11.25 | 11.25 | 77.50 | 8.70 | 11.30 | 80.0 |
| 15 | 25 | 36.50 | 58.50 | 5.00 | 31.20 | 56.40 | 12.40 |
| 15 | 25 | 23.80 | 63.20 | 13.00 | 25.50 | 61.60 | 13.00 |
| 15 | 25 | 15.30 | 40.70 | 44.00 | 16.10 | 39.00 | 44.90 |
| 15 | 25 | 15.20 | 24.30 | 60.50 | 13.50 | 24.50 | 62.00 |
| 25 | 34 | 61.00 | 30.50 | 8.50 | 51.0 | 38.00 | 11.00 |
| 25 | 34 | 33.00 | 33.00 | 34.00 | 27.15 | 35.55 | 37.30 |
| 25 | 34 | 32.00 | 32.00 | 36.00 | 26.25 | 34.25 | 39.50 |
| 25 | 34 | 30.55 | 24.75 | 44.50 | 24.05 | 27.95 | 48.00 |
| 25 | 32 | 27.25 | 37.75 | 25.00 | 39.20 | 43.20 | 17.60 |
| 25 | 32 | 42.50 | 42.50 | 15.00 | 36.00 | 47.00 | 17.00 |
| 25 | 32 | 26.00 | 41.50 | 32.50 | 24.05 | 42.25 | 39.70 |
| 25 | 32 | 26.00 | 26.00 | 48.00 | 21.00 | 27.40 | 51.60 |
| 25 | 32 | 26.13 | 20.85 | 53.00 | 20.20 | 22.10 | 57.70 |
| 25 | 3E+1 | 46.25 | 46.25 | 7.50 | 39.66 | 51.78 | 8.56 |
| 25 | 3E+1 | 33.80 | 54.20 | 12.00 | 31.00 | 56.30 | 12.70 |
| 25 | 3E+1 | 20.50 | 54.25 | 25.00 | 21.70 | 53.70 | 24.60 |
| 25 | 3E+1 | 18.00 | 48.00 | 34.00 | 19.20 | 46.80 | 34.00 |
| 25 | 3E+1 | 21.90 | 35.10 | 43.00 | 19.70 | 35.70 | 44.60 |
| 25 | 3E+1 | 22.50 | 22.50 | 50.0 | 18.00 | 23.50 | 58.50 |
| 25 | 28 | 24.50 | 65.00 | 10.50 | 26.00 | 63.50 | 10.50 |
| 25 | 28 | 15.50 | 41.50 | 43.00 | 16.60 | 40.40 | 43.00 |
| 25 | 28 | 16.35 | 26.15 | 57.50 | 14.50 | 26.30 | 59.20 |
(a) The composition unit is g/100 g of solute.
