SDS Volume
Volume 66. Ammonium Phosphates, p None
Source Publication
Paravano, N.; Mieli, A.; Gazz. Chim. 1908, 38, 535.
Conditions:
Composition and temperature with a NH4H2PO4/H3PO4 ratio equal - 1.
Compiler:
Methodology:
Saturation temperatures were determined visually as the temperature at which the last crystal disappeared.
Sample Information:
- $\ce{NH4H2PO4.H3PO4}$ was prepared from an equimolar mixture of concentrated solutions of $\ce{NH4H2PO4}$ and $\ce{H3PO4}$ by slow crystallization. The analysis was: $\ce{P2O5}$ 66.27% (found), 66.65% (calculated); $\ce{(NH4)2O}$ 12.15% (found), 12.25% (calculated)
Measurement Errors:
Ambient temperature: No information is given.
Mass concentration (m/v) (1): No information is given.
System Components:
- Ammonium dihydrogenphosphate, $\ce{ NH4H2PO4 }$; [7722-76-1] NIST WebBook
- Phosphoric acid, $\ce{ H3PO4 }$; [7664-38-2] NIST WebBook
- Water, $\ce{ H2O }$; [7732-18-5] NIST WebBook
Experimental Data
| $T$ (°C) | 100w1 | 100w2 | $x_{1}$ | m1 (mol/kg) a |
|---|---|---|---|---|
| 48.5 | 64.10 | 35.90a | 0.1311 | 8.380 |
| 66.2 | 74.07 | 25.93 | 0.1947 | 13.41 |
| 92.5 | 84.48 | 15.52 | 0.3153 | 25.55 |
| 97.0 | 86.38 | 13.62 | 0.3491 | 29.77 |
| 109.8 | 92.58 | 7.42 | 0.5134 | 58.58 |
| 112.8 | 95.80 | 4.20 | 0.6587 | 107.1 |
| 118 | 1E+2 | 0.00 | 1 |
(a) These values were calculated by the compiler.
