SDS Volume (4814)
Volume 73. Metal and Ammonium Formate Systems, p None
Original Measurements
Itkina, L. S.; Portnova, S. M.; Karahanyan, S. A.; Zh. Neorg. Khim. 24, 264 (1979).
Variables:
Room Temp: Composition at 25 °C
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 [1]. The strontium content was determined by EDTA titration at pH 10, using Eriochrome Black T as indicator. The composition of the solid phases was determined by Schreinemakers' method.
Source and Purity of Materials:
- No information is given.
Estimated Errors:
Ambient temperature: 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
- Strontium formate, $\ce{ Sr(CHO2)2 }$; [592-89-2] NIST WebBook
- Water, $\ce{ H2O }$; [7732-18-5] NIST WebBook
Experimental Data
Solubility values in the LiCHO2-Sr(CHO2)2-H2O system at 25°C.
| 100w1 | 100w2 | m1 (mol/kg) | m2 (mol/kg) | Phase (s) () |
|---|---|---|---|---|
| 27.99 | - | 7.48 | - | A |
| 28.75 | 0.12 | 7.78 | 9 x 10-3 | A |
| 28.35 | 0.30 | 7.65 | 0.024 | A |
| 27.41 | 1.15 | 7.39 | 0.024 | A + B |
| 27.52 | 0.87 | 7.41 | 0.076 | A + B |
| 25.07 | 0.91 | 6.52 | 0.069 | B |
| 18.38 | 1.46 | 4.41 | 0.102 | B |
| 18.18 | 1.44 | 4.35 | 0.100 | B |
| 10.08 | 3.62 | 2.24 | 0.236 | B |
| 4.72 | 7.00 | 1.03 | 0.446 | B |
| - | 10.91 | - | 0.689 | B |
(a) The solid phases are: A = LiCHO2·H2O; B = Sr(CHO2)2·2H2O.
(b) The molality values were calculated by the compilers.
