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IUPAC-NIST Solubility Database
NIST Standard Reference Database 106
Solubility System:
Lithium formate with Formic acid
Components:
(1) Formic acid; CH2O2; [64-18-6]
NIST Chemistry WebBook
for detail
(2) Lithium formate; LiCHO2; [556-63-8]
NIST Chemistry WebBook
for detail
Original Measurements:
Kendall, J.; Adler, H., J. Am. Chem. Soc. 43, 1470 (1921).
Variables:
Temperature = -25.0 ºC to 163.5 ºC.
Prepared By:
T. A. Ageyeva
Experimental Data:
(Notes on the Nomenclature)
The solubility of lithium formate in formic acid.
t/°C
10
0
* Mole Fraction
1
Solid Phase(s)
8.4
0.0
CH2O2
7.0
1.59
CH2O2
5.2
3.47
CH2O2
3.2
5.33
CH2O2
1.1
7.09
CH2O2
-1.3
8.93
CH2O2
-3.5
10.75
CH2O2
-5.6
12.23
CH2O2
-8.2
13.99
CH2O2
-14.6
18.19
CH2O2
-17.1
19.56
CH2O2
-19.8
21.25
CH2O2
-21.7
22.24
CH2O2
-23.5
23.49
CH2O2
-25.0
24.33
CH2O2
18.0
23.49
LiCHO2
34.0
23.93
LiCHO2
80.0
25.31
LiCHO2
90.5
25.91
LiCHO2
97.9
26.38
LiCHO2
113.1
27.71
LiCHO2
131.2
29.87
LiCHO2
145.1
31.98
LiCHO2
150.4
33.04
LiCHO2
159.1
35.01
LiCHO2
163.5
36.13
LiCHO2
Method/Apparatus/Procedure:
The only information given is that the solubility values were determined by the freezing point method.
Source and Purity of Materials:
The lithium salt was prepared by dissolving the carbonate in 90% formic acid. The salt was dried at 373 K and purified by recrystallizing from alcohol and drying over sulfuric acid in a vacuum. Formic acid was prepared by treating a c.p. product with B
2
O
3
. It was then distilled
in vacuo
until a product melting above 281.6 K was obtained.
Estimated Errors:
Solubility: Nothing is specified.
Temperature: Nothing is specified.