SDS Volume (4587)
Volume 73. Metal and Ammonium Formate Systems, p None
Original Measurements
Itkina, L. S.; Masitov, R. K.; Portnova, S. M.; Zh. Neorg. Khim. 22, 803-8 (1977).
Variables:
Room Temp: Composition at 25 °C
Prepared by:
St. Trendafilova, Chr. Balarew
Method/Apparatus/Procedure:
The isothermal method was used. Seven days were allowed for equilibration. The lithium content of both phases was determined iodometrically, the OH content was determined by titration with $\ce{HClO4}$ in an ethylene glycol medium. The content of $\ce{LiCHO2}$ was determined by difference. The composition of the solid phases was determined by Schreinemakers' method and controlled crystallo-optically, and by IR spectroscopy.
Source and Purity of Materials:
- Nothing is specified.
Estimated Errors:
Ambient temperature: No information is given.
Mass concentration (m/v) (1): No information is given.
Components:
- Lithium formate, $\ce{ LiCHO2 }$; [556-63-8] NIST WebBook
- Lithium hydroxide, $\ce{ LiOH }$; [1310-65-2] NIST WebBook
- Water, $\ce{ H2O }$; [7732-18-5] NIST WebBook
Experimental Data
Solubility values in the LiCHO2-LiOH-H2O system at 25°C.
| 100w1 | 100w2 | m1 (mol/kg) | m2 (mol/kg) | Phase (s) () |
|---|---|---|---|---|
| - | 27.99 | - | 7.48 | A |
| 2.32 | 27.71 | 1.38 | 7.62 | A |
| 4.03 | 27.19 | 2.45 | 7.61 | A |
| 4.50 | 25.45 | 2.68 | 6.99 | B |
| 5.47 | 21.95 | 3.15 | 5.82 | B |
| 6.02 | 16.47 | 3.24 | 4.09 | B |
| 7.09 | 11.90 | 3.65 | 2.83 | B |
| 7.68 | 9.20 | 3.86 | 2.13 | B |
| 8.47 | 9.20 | 4.30 | 2.15 | B |
| 10.18 | 2.62 | 4.87 | 0.58 | B |
| 11.10 | 0.0 | 5.21 | 0.0 | C |
(b) The solid phases are: A = LiCHO2·H2O; B = solid solutions in LiOH·H2O; and C = LiOH·H2O.
(a) These values were calculated by the compilers.
