SDS Volume (4832)
Volume 73. Metal and Ammonium Formate Systems, p None
Original Measurements
Itkina, L. S.; Nadzharyan, K. A.; Lepeshkov, I. N.; Zh. Neorg. Khim. 24, 2244 (1979).
Variables:
Temperature: Composition at 50 °C
Prepared by:
St. Trendafilova, Chr. Balarew
Method/Apparatus/Procedure:
The isothermal method was used. The mixtures were placed in glass vessels in a thermostat and stirred mechanically. Equilibrium was reached in 1.5-2 weeks. The lithium content of both phases was determined by flame photometry. The cadmium content was determined complexometrically. The composition of the solid phases was determined by Schreinemakers' method.
Source and Purity of Materials:
- LiCHO2·H2O was prepared by neutralizing 85% formic acid with p.a. grade LiOH. Cadmium formate was obtained from p.a. grade cadmium carbonate.
Experimental Data
Lithium formate with Cadmium formate and Water
Components:
(1) Lithium formate,
$\ce{ LiCHO2 }$;
[556-63-8]
NIST WebBook
(2) Cadmium formate,
$\ce{ Cd(CHO2)2 }$;
[4464-23-7]
NIST WebBook
(3) Water,
$\ce{ H2O }$;
[7732-18-5]
NIST WebBook
Experimental Values:
Solubility values in the LiCHO2-Cd(CHO2)2-H2O system at 50°C.
| 100w2 | 100w1 | m2 (mol/kg)b | m1 (mol/kg)b | Phase (s)a |
|---|---|---|---|---|
| - | 27.77 | - | 1.899 | A |
| 6.37 | 21.52 | 1.7 | 1.474 | A |
| 12.0 | 24.41 | 3.632 | 1.896 | A |
| 14.07 | 28.76 | 4.373 | 2.485 | A |
| 14.86 | 25.59 | 4.803 | 2.123 | A + B |
| 16.42 | 30.72 | 5.979 | 2.871 | B |
| 17.31 | 30.61 | 6.397 | 2.903 | B |
| 17.75 | 30.44 | 6.594 | 2.902 | B |
| 17.99 | 31.39 | 6.84 | 3.063 | B |
| 18.41 | 31.44 | 7.065 | 3.097 | B |
| 18.79 | 31.33 | 7.25 | 3.103 | B + C |
| 19.09 | 31.01 | 7.363 | 3.069 | C |
| 19.79 | 30.3 | 7.632 | 2.999 | C |
| 21.14 | 28.12 | 8.019 | 2.737 | C |
| 25.06 | 22.77 | 9.245 | 2.156 | C |
| 25.76 | 21.13 | 9.335 | 1.965 | C |
| 29.88 | 18.86 | 11.22 | 1.818 | C |
| 30.11 | 18.75 | 11.33 | 1.811 | C + D |
| 30.09 | 14.92 | 10.53 | 1.34 | D |
| 30.8 | 7.64 | 9.629 | 6.13 x 10-1 | D |
| 36.04 | - | 10.845 | - | D |
(a) The solid phases are: A = Cd(CHO2)2·2H2O; B = Cd(CHO2)2; C = LiCHO2·Cd(CHO2)2; D = LiCHO2·H2O. (b) The molality values were calculated by the compilers.
