SDS Volume (4813)
Volume 73. Metal and Ammonium Formate Systems, p None
Original Measurements
Itkina, L. S.; Portnova, S. M.; Zh. Neorg. Khim. 25, 1109 (1980).
Variables:
Composition and temperature
Prepared by:
St. Trendafilova, Chr. Balarew
Method/Apparatus/Procedure:
The isothermal method was used. Three weeks were allowed for equilibration. The lithium content of both phases was determined by flame photometry in the presence of $\pu{0.1 M} \ce{Al(NO3)3}$ [1]. $\ce{Ca^{2+}}$ was determined complexometrically. The composition of the solid phases was determined by Schreinemakers' method and controlled crystallo-optically.
Source and Purity of Materials:
- The formates were prepared by neutralization of formic acid with the corresponding oxides, hydroxides or carbonates.
Estimated Errors:
Ambient temperature: No information is given.
Mass concentration (m/v) (1): No information is given.
References
1 Poluektov, N. S.; Methods of Flame-Photometrical Analysis (Russ.), Moscow, Goskhimizdat, p. 132 (1959).
Components:
- Lithium formate, $\ce{ LiCHO2 }$; [556-63-8] NIST WebBook
- Calcium formate, $\ce{ Ca(CHO2)2 }$; [544-17-2] NIST WebBook
- Water, $\ce{ H2O }$; [7732-18-5] NIST WebBook
Experimental Data
Table 1. Solubility values in the LiCHO2-Ca(CHO2)2-H2O system at 25°C.
| 100w1 | 100w2 | m1 (mol/kg) | m2 (mol/kg) | Phase (s) () |
|---|---|---|---|---|
| 27.99 | - | 7.481 | - | A |
| 26.75 | 1.70 | 7.195 | 0.183 | A |
| 26.44 | 2.24 | 7.135 | 0.241 | A + B |
| 23.40 | 2.06 | 6.042 | 0.212 | B |
| 21.36 | 2.34 | 5.388 | 0.236 | B |
| 12.64 | 4.57 | 3.938 | 0.424 | B |
| - | 14.70 | - | 1.324 | B |
(a) The solid phases are: A = LiCHO2·H2O; B = Ca(CHO2)2.
(b) The molality values were calculated by the compilers.
(a) The solid phases are: A = LiCHO2·H2O; B = Ca(CHO2)2.
(b) The molality values were calculated by the compilers.
