Solubility System: Lithium formate with Sodium formate and Water
Components:

(1) Lithium formate, LiCHO2; [556-63-8] NIST WebBook
(2) Sodium formate, NaCHO2; [141-53-7] NIST WebBook
(3) Water, H2O; [7732-18-5] NIST WebBook

Original Measurements

Portnova, S. M.; Itkina, L. S.; Russ. J. Inorg. Chem. 24, 119-22 (1979).

Variables:

Ambient temperature: Composition at 50 °C

Prepared by:

St. Trendafilova, Chr. Balarew

Method/Apparatus/Procedure:

The isothermal method was used. Three weeks were allowed for equilibration. The lithium and sodium content of both phases was determined by flame photometry. The composition of the solid phases was determined by IR spectroscopy, by DT analysis, by x-ray diffraction and crystallo-optically.

Source and Purity of Materials:
  1. The lithium and sodium formates were prepared by neutralization of formic acid with the corresponding metal hydroxides.
Estimated Errors:

Ambient temperature: No information is given.
Mass concentration (m/v) (1): No information is given.

Experimental Values:
Solubility values in the LiCHO2-NaCHO2-H2O system at 50°C.
100w1 100w2 m1 (mol/kg)a m2 (mol/kg)a Phase (s)b
36.04 - 10.845 - A
32.68 9.09 10.8 2.3 A
29.33 15.58 10.25 4.158 A
23.29 24.94 8.658 7.08 A
26.78 25.09 10.71 7.665 A
26.78 26.26 10.98 8.222 A
23.74 25.23 8.938 7.269 C
23.74 25.14 8.938 7.231 C
23.12 30.44 9.582 9.638 C
22.52 31.21 9.368 9.918 C
20.39 36.78 9.163 12.63 C
17.08 41.53 7.942 14.75 C
15.64 43.43 7.354 15.6 C
15.66 45.32 7.724 17.08 B
13.84 44.62 6.412 15.79 B
13.73 43.05 6.144 14.65 B
11.95 43.7 5.186 14.49 B
- 49.97 14.687 - B

(a) The molality values were calculated by the compilers. (b) The solid phases are: A = LiCHO2·H2O ; B = NaCHO2; C = Phase of variable composition.

Download Data   link to XML output link to JSON output link to JSON-LD output