SDS Volume
Volume 73. Metal and Ammonium Formate Systems, p None
Source Publication
Itkina, L. S.; Petrova, E. V.; Russ. J. Inorg. Chem. 24, 613-8 (1979).
Conditions:
Room Temp: Composition at 25 °C
Compilers:
St. Trendafilova, Chr. Balarew
Methodology:
The isothermal method was used. Equilibrium was reached in six days. The lithium content of both phases was determined by flame photometry. The rubidium content was determined as the difference between the total formate content and the amount of formate present as lithium formate. This was done either permanganometrically or by the tetraphenyl borate method. The composition of the solid phases was determined by Schreinemakers' method.
Sample Information:
- $\ce{LiCHO2}$ was prepared by heating PA grade $\ce{LiCHO2.H2O}$ at 120°C. $\ce{CsCHO2}$ was obtained by neutralizing 85% PA grade formic acid with a pure $\ce{CsOH}$. After evaporating up to 130°C and cooling, the crystals were dried over $\ce{H2SO4}$ in a vacuum.
Measurement Errors:
Ambient temperature: No information is given.
Mass concentration (m/v) (1): No information is given.
System Components:
- Lithium formate, $\ce{ LiCHO2 }$; [556-63-8] NIST WebBook
- Rubidium formate, $\ce{ RbCHO2 }$; [3495-35-0] NIST WebBook
- Water, $\ce{ H2O }$; [7732-18-5] NIST WebBook
Experimental Data
| 100w1 | 100w2 | m1 (mol/kg) | m2 (mol/kg) | Phase (s) () |
|---|---|---|---|---|
| 27.99 | - | 7.481 | - | A |
| 20.21 | 23.14 | 6.866 | 3.130 | A |
| 20.59 | 27.92 | 7.696 | 4.155 | A |
| 18.57 | 40.76 | 8.788 | 7.681 | A |
| 19.69 | 45.68 | 10.94 | 10.11 | A |
| 19.24 | 48.61 | 11.52 | 11.59 | A |
| 22.61 | 56.92 | 21.26 | 21.31 | A + B |
| 13.93 | 68.20 | 15.00 | 29.25 | B |
| 13.48 | 67.88 | 13.92 | 27.91 | B |
| 10.18 | 71.92 | 10.95 | 30.79 | B |
| 8.39 | 75.56 | 10.1 | 36.08 | B |
| 7.26 | 66.30 | 5.29 | 19.22 | B |
| 5.99 | 68.69 | 4.55 | 20.79 | B + C |
| 2.25 | 69.57 | 1.54 | 18.93 | C |
| 3.59 | 75.82 | 3.36 | 28.22 | C |
| 3.22 | 77.11 | 3.15 | 30.04 | C |
| 2.77 | 80.93 | 3.27 | 38.05 | C |
| 2.17 | 83.43 | 2.90 | 44.40 | C |
| - | 82.26 | - | 35.53 | C |
(a) The solid phases are: A = LiCHO2·H2O; B = LiCHO2·RbCHO2·0.5H2O; C = RbCHO2·H2O.
(b) The molality values were calculated by the compilers.
