SDS Volume (4680)
Volume 73. Metal and Ammonium Formate Systems, p None
Original Measurements
Portnova, S. M.; Lyashchenko, A. K.; Zh. Neorg. Khim. 27, 2953-8 (1982).
Variables:
Composition and temperature
Prepared by:
St. Trendafilova, Chr. Balarew
Method/Apparatus/Procedure:
The isothermal method was used. The lanthanum content of the solid and liquid phases was determined complexometrically using Complexon III and Methylthymol Blue as indicator. The nitrogen content of the liquid phase was determined iodometrically. The nitrogen content of the solid phases was determined by the Dumas method.
Source and Purity of Materials:
- Lanthanum formate was obtained by reaction of lanthanum oxide with formic acid.
Estimated Errors:
Ambient temperature: No information is given.
Mass concentration (m/v) (1): No information is given
Components:
- Lanthanum formate, $\ce{ La(CHO2)3 }$; [2081-11-0] NIST WebBook
- Ethylenediaminetetraacetic acid, disodium salt, $\ce{ C10H18N2Na2O10 }$; [6381-92-6] NIST WebBook
- Glucose, $\ce{ C6H12O6 }$; [50-99-7] NIST WebBook
- Nitrilotriacetic acid, $\ce{ C6H9NO6 }$; [139-13-9] NIST WebBook
- Water, $\ce{ H2O }$; [7732-18-5] NIST WebBook
Experimental Data
Part 2. Solubility values in the La(CHO2)3-glucose-H2O system.
| $T$ (°C) | 100w5 | 100w1 | 100w3 | m1 (mol/kg) | m3 (mol/kg) | Phase (s) () |
|---|---|---|---|---|---|---|
| 25 | 95.78 | 0.22 | 4.0 | 8 x 10-3 | 0.232 | A |
| 25 | 91.77 | 0.23 | 8.0 | 9 x 10-3 | 0.484 | A |
| 25 | 88.62 | 0.38 | 11.0 | 0.016 | 0.689 | A |
| 50 | 95.66 | 0.34 | 4.0 | 0.013 | 0.232 | A |
| 50 | 91.64 | 0.36 | 8.0 | 0.014 | 0.485 | A |
(a) The molality values were calculated by the compilers.
(b) The solid phase is: A = La(CHO2)3.
