Compilation - Ammonium dihydrogenphosphate with Urea, Ammonium nitrate and Water (IUPAC SDS Volume 66)
SDS Volume (2847)
Volume 66. Ammonium Phosphates, p None
Original Measurements
Tudorovskaya, G. L.; Margolis, F. G.; Khim. Prom. 1966, 42, 678.
Variables:
Room Temp: Composition at 50 °C
Prepared by:
Method/Apparatus/Procedure:
An isothermal method was used. Equilibrium was checked by repeated analysis.
Source and Purity of Materials:
- No information is given.
Estimated Errors:
Ambient temperature: The temperature was kept constant to within 0.1 K.
Mass concentration (m/v) (1): No information is given.
Components:
- Ammonium dihydrogenphosphate, $\ce{ NH4H2PO4 }$; [7722-76-1] NIST WebBook
- Urea, $\ce{ CH4N2O }$; [57-13-6] NIST WebBook
- Ammonium nitrate, $\ce{ NH4NO3 }$; [6484-52-2] NIST WebBook
- Water, $\ce{ H2O }$; [7732-18-5] NIST WebBook
Experimental Data
Part 2. The authors express the concentrations of the solutions in Part 1 in the following way also.
| g1/100 g solute (g1/100 g2) | g2/100 g solute (g1/100 g2) | g3/100 g solute (g1/100 g2) | g4/100 g solute (g1/100 g2) |
|---|---|---|---|
| 97.10 | 2.9 | 35.40 | |
| 17.40 | 79.79 | 2.81 | 24.75 |
| 25.50 | 71.95 | 2.55 | 16.10 |
| 36.12 | 61.69 | 2.19 | 12.65 |
| 38.78 | 59.60 | 1.62 | 11.96 |
| 46.50 | 51.66 | 1.84 | |
| 48.92 | 48.58 | 2.51 | |
| 60.50 | 36.55 | 2.95 | 17.85 |
| 61.60 | 35.18 | 3.22 | 17.20 |
| 69.60 | 21.40 | 9.00 | 30.13 |
| 77.20 | 11.18 | 16.62 | 35.60 |
| 71.03 | 25.57 | 38.63 | |
| 100.0 | 29.78 | ||
| 100.0 | 50.33 | ||
| 100.0 | 140.60 |
(a) The compiler calculated the molalities as mol/kg H2O values.
(b) The solid phases are: A = NH
(c) The molalities designated as XX cannot be calculated, because the solutions are anhydrous.
(a) The authors state that the composition unit is g H2O/100 g solute. The compiler's opinion is that this is a typographical error and the composition unit is g/100 g solute.
(b) This is an obvious error. The correct values are: ---- for urea and 97.10 for NH4NO3 (compiler).
