SDS Volume (2899)
Volume 66. Ammonium Phosphates, p None
Original Measurements
Iovi, A.; Haiduc, C.; Rev. Roum. Chim. 16, 1743 (1971).
Variables:
Temperaure. Equimolar mixtures of KCl + NH4H2PO4 or NH4Cl and KH2PO4 are used.
Prepared by:
Method/Apparatus/Procedure:
The samples were equilibrated by stirring for ten hours in a thermostat. The potassium content was determined with the use of a type C Zeiss Jena Model III flame photometer and gravimetrically as $\ce{KClO4}$, phosphate ion was determined by a complexometric titration with $\ce{MgCl2}$ using Eriochrome Black T as indicator, [1] chloride was determined by potentiometric titration with $\ce{AgNO3}$, and $\ce{NH3}$ was determined by the Kjeldahl method.
Source and Purity of Materials:
- No information is given.
Estimated Errors:
Ambient temperature: No information is given.
Mass concentration (m/v) (1): No information is given.
References
1 Liteanu, C.; Chimie anilitica Cantitativa, Ed. didactica si pedagogica, Bucuresti, p. 508 (1964).
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
The compiler has recalculated these values as follows:
| 100w1 | 100w2 | 100w3 | 100w4 | m1 (mol/kg) | m2 (mol/kg) | m3 (mol/kg) | m4 (mol/kg) |
|---|---|---|---|---|---|---|---|
| 5.02 | 14.60 | 7.35 | 4.95 | 0.76 | 6.04 | 2.76 | 4.03 |
| 5.83 | 14.50 | 7.32 | 5.07 | 0.89 | 6.07 | 2.78 | 4.18 |
| 5.83 | 14.38 | 7.32 | 5.01 | 0.89 | 6.01 | 2.77 | 4.11 |
| 8.29 | 13.62 | 7.72 | 4.89 | 1.30 | 5.86 | 3.01 | 4.14 |
| 8.29 | 13.32 | 7.72 | 4.74 | 1.29 | 5.69 | 2.99 | 3.99 |
| 12.24 | 13.01 | 8.03 | 5.18 | 2.05 | 5.96 | 3.33 | 4.67 |
| 17.26 | 12.51 | 8.92 | 5.44 | 3.18 | 6.31 | 4.08 | 5.40 |
| 17.26 | 12.22 | 8.92 | 6.30 | 3.16 | 6.12 | 4.05 | 5.22 |
| 19.43 | 12.02 | 9.24 | 5.45 | 3.72 | 6.29 | 4.39 | 5.61 |
| 19.43 | 11.99 | 9.24 | 5.43 | 3.71 | 6.27 | 4.38 | 5.59 |
