SDS Volume
Volume 73. Metal and Ammonium Formate Systems, p None
Source Publication
Portnova, S. M.; Lyashchenko, A. K.; Zh. Neorg. Khim. 27, 2953-8 (1982).
Conditions:
Room Temp: Composition at 50 °C
Compilers:
St. Trendafilova, Chr. Balarew
Methodology:
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.
Sample Information:
- Lanthanum formate was obtained by reaction of lanthanum oxide with formic acid.
Measurement Errors:
Ambient temperature: No information is given.
Mass concentration (m/v) (1): No information is given
System Components:
- Lanthanum formate, $\ce{ La(CHO2)3 }$; [2081-11-0] NIST WebBook
- Urea, $\ce{ CH4N2O }$; [57-13-6] NIST WebBook
- Water, $\ce{ H2O }$; [7732-18-5] NIST WebBook
Experimental Data
| 100w1 | 100w2 | m1 (mol/kg) a | m2 (mol/kg) a | Phase (s) () b |
|---|---|---|---|---|
| 0.30 | - | 0.011 | - | A |
| 0.02 | 9.89 | 8 x 10-4 | 1.83 | A |
| 0.01 | 31.09 | 5 x 10-4 | 7.513 | A |
| 0.01 | 53.71 | 8 x 10-4 | 19.32 | A |
| 0.05 | 55.18 | 4 x 10-3 | 20.52 | A |
(a) The molality values were calculated by the compilers and the editor.
(b) The solid phase is: A = La(CHO2)3.
