SDS Volume
Volume 66. Ammonium Phosphates, p None
Source Publication
Askenasy, P.; Nessler, F.; Z. Anorg. Allg. Chem. 189, 305 (1930).
Conditions:
Room Temp: 0 °C
Compiler:
Methodology:
Binary eutonic solutions were prepared on the basis of a preliminary investigation of the boundary ternary systems. Samples on the curve for the simultaneous crystallization of two salts were then prepared by adding a third component. The mixtures were shaken in a thermostat for two to four days. The solid phase was isolated by centrifuging. The analytical methods are not described.
Sample Information:
- No information is given.
Measurement Errors:
Ambient temperature: The temperature was controlled to within ±0.1 K. No other information is given.
Mass concentration (m/v) (1): No information given.
System Components:
- Ammonium dihydrogenphosphate, $\ce{ NH4H2PO4 }$; [7722-76-1] NIST WebBook
- Ammonium chloride, $\ce{ NH4Cl }$; [12125-02-9] NIST WebBook
- Potassium dihydrogenphosphate, $\ce{ KH2PO4 }$; [7778-77-0] NIST WebBook
- Potassium chloride, $\ce{ KCl }$; [7447-40-7] NIST WebBook
- Water, $\ce{ H2O }$; [7732-18-5] NIST WebBook
Experimental Data
| 100w1 | 100w2 | 100w3 | 100w4 | 100w5 | m1 (mol/kg) | m2 (mol/kg) | m3 (mol/kg) | m4 (mol/kg) | Phase (s) () |
|---|---|---|---|---|---|---|---|---|---|
| 3.25 | 14.47 | 1.38 | 7.32 | 73.55 | 0.45 | 554 | 0.48 | 5.52 | A + B |
| 3.33 | 14.63 | 2.11 | 7.08 | 72.82 | 0.47 | 566 | 0.74 | 5.39 | A + B |
| 3.53 | 14.67 | 3.15 | 6.66 | 71.96 | 0.50 | 574 | 1.11 | 5.13 | A + B |
| 3.80 | 14.96 | 4.39 | 6.28 | 70.54 | 0.55 | 598 | 1.59 | 4.94 | A + B |
| 4.00 | 15.36 | 5.32 | 6.10 | 69.19 | 0.59 | 626 | 1.96 | 4.89 | C |
| 3.64 | 14.74 | 5.28 | 5.73 | 70.58 | 0.53 | 588 | 1.91 | 4.50 | D + E |
| 3.57 | 14.44 | 5.67 | 5.39 | 70.91 | 0.51 | 574 | 2.04 | 4.21 | D + E |
| 2.63 | 11.86 | 9.41 | 2.17 | 73.90 | 0.36 | 452 | 3.25 | 1.63 | D + E |
| 2.39 | 10.48 | 10.74 | 0.82 | 75.54 | 0.32 | 391 | 3.63 | 0.60 | D + E |
| 2.17 | 10.10 | 10.81 | 0.55 | 76.34 | 0.29 | 373 | 3.62 | 0.40 | D + E |
| 1.63 | 15.99 | 5.15 | 6.05 | 71.15 | 0.23 | 633 | 1.85 | 4.72 | D + F |
| 3.54 | 11.94 | 8.43 | 2.84 | 73.23 | 0.49 | 459 | 2.94 | 2.15 | G |
| 11.23 | 4.84 | 4.85 | 2.31 | 76.65 | 1.50 | 177 | 1.61 | 1.66 | G |
| 8.48 | 6.07 | 4.60 | 2.54 | 78.28 | 1.11 | 218 | 1.50 | 1.80 | G |
| 7.80 | 7.56 | 4.90 | 3.03 | 76.68 | 1.04 | 278 | 1.63 | 2.19 | G |
| 7.30 | 7.15 | 4.68 | 2.83 | 78.02 | 0.96 | 258 | 1.53 | 2.01 | G |
| 6.86 | 10.22 | 5.74 | 3.82 | 73.34 | 0.96 | 393 | 2.00 | 2.89 | G |
| 4.65 | 11.28 | 5.56 | 4.03 | 74.46 | 0.64 | 427 | 1.91 | 3.00 | G |
| 7.21 | 7.23 | 4.81 | 2.80 | 77.93 | 0.95 | 261 | 1.57 | 1.99 | G |
| 6.31 | 7.12 | 3.83 | 3.02 | 79.69 | 0.81 | 251 | 1.23 | 2.10 | G |
| 4.10 | 13.81 | 4.49 | 5.71 | 71.88 | 0.58 | 541 | 1.59 | 4.40 | G |
| 6.05 | 9.88 | 3.82 | 4.38 | 75.84 | 0.82 | 367 | 1.29 | 3.20 | G |
(a) A formula in quotation marks refers to a solid solution rich in that component.
(a) The solid phases are: A = "NH4Cl" B = "NH4H2PO4"; C = ternary eutectic point; D = "KCl"; E = "KH2PO4"; F = "NH4Cl"; G = a precipitate designated as (K,NH4)H2PO4. The quotation marks have the same meaning as on the preceding page.
