SDS Volume (4697)
Volume 73. Metal and Ammonium Formate Systems, p None
Original Measurements
Sas, T. M.; Rodina,G. L.; Velikodnyn, Yu. A.; Tr. IREA Moscow Ser. Reagents and specially pure substances 42, 168 (1980).
Variables:
Room Temp: Composition at 298.2 $\pu{K}$
Prepared by:
Method/Apparatus/Procedure:
The isothermal method was used [1]. The formic acid was determined by titration with $\pu{0.1 N} \ce{NaOH}$ using phenolphthalein as indicator. The $\ce{LiCHO2}$ concentration was determined by titration with $\ce{NaOH}$ after passing the weighed sample through a chromatographic column. The water content was calculated by difference. The solid phase was identified by chemical, thermogravimetric, gas chromatographic and X-ray methods.
Source and Purity of Materials:
- No information is given.
Estimated Errors:
Mass concentration (m/v) (1): ±0.5 mass%. Nothing else is specified.
References
1 Othmer, D. F.; Tobias, P. E.; Ind. Eng. Chem. 34, 690 (1942).
Components:
- Lithium formate, $\ce{ LiCHO2 }$; [556-63-8] NIST WebBook
- Formic acid, $\ce{ CH2O2 }$; [64-18-6] NIST WebBook
- Water, $\ce{ H2O }$; [7732-18-5] NIST WebBook
Experimental Data
Note: Data are also presented for 323.2 K, but only in graphical form.
Solubility in the LiCHO2-CH2O2-H2O system at 298.2 K.
| 100w1 | 100w2 | 100w3 | $100 x_{1}$ | $100 x_{2}$ | $100 x_{3}$ | Phase (s) () |
|---|---|---|---|---|---|---|
| 27.0 | 71.5 | 1.5 | 24.1 | 72.0 | 3.9 | A |
| 24.9 | 69.5 | 5.6 | 20.8 | 65.7 | 13 | A |
| 19.3 | 58.5 | 22.2 | 12.9 | 44.2 | 42.9 | A |
| 23.2 | 34.4 | 42.4 | 12.6 | 21.1 | 66.3 | A |
| 32.9 | 21.2 | 45.9 | 17.4 | 12.7 | 70.0 | A |
(a) These values were calculated by the compiler.
(b) The solid phase is: A = LiCHO2·CH2O2.
