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IUPAC-NIST Solubility Database
NIST Standard Reference Database 106
Solubility System:
Lithium formate with Sodium formate and Water
Components:
(1) Lithium formate; LiCHO2; [556-63-8]
NIST Chemistry WebBook
for detail
(2) Sodium formate; NaCHO2; [141-53-7]
NIST Chemistry WebBook
for detail
(3) Water; H2O; [7732-18-5]
NIST Chemistry WebBook
for detail
Original Measurements:
Portnova, S.M.; Itkina, L.S., Zh. Neorg. Khim. 24, 213-7 (1979); Russ. J. Inorg. Chem.(Engl. Transl.) 24, 119-22 (1979).
Variables:
Concentration = Composition at 25 ºC
Prepared By:
Chr. Balarew and St. Trendafilova
Experimental Remarks:
The molality values were calculated by the compilers.
Experimental Data:
(Notes on the Nomenclature)
(Please see footnotes following the table(s).)
Solubility values in the LiCHO
2
-NaCHO
2
-H
2
O system at 25 °C.
Chemical
1
Phase
Mass Fraction w
1
m
1
[mol kg-1]
Chemical
2
Mass Fraction w
2
m
2
[mol kg-1]
Solid Phase(s)
a
LiCHO2
Liquid phase
27.99
7.481
NaCHO2
---
---
A
LiCHO2
Liquid phase
27.94
7.621
NaCHO2
1.50
0.313
A
LiCHO2
Liquid phase
27.34
7.814
NaCHO2
5.32
1.162
A
LiCHO2
Liquid phase
25.02
7.390
NaCHO2
9.82
2.216
A
LiCHO2
Liquid phase
23.07
6.857
NaCHO2
12.18
2.766
A
LiCHO2
Liquid phase
20.30
6.541
NaCHO2
19.97
4.916
A
LiCHO2
Liquid phase
16.03
5.081
NaCHO2
23.25
5.630
A
LiCHO2
Liquid phase
14.45
4.884
NaCHO2
28.61
7.388
A
LiCHO2
Liquid phase
14.23
4.816
NaCHO2
28.90
7.472
A
LiCHO2
Liquid phase
15.58
5.721
NaCHO2
32.01
8.981
A
LiCHO2
Liquid phase
17.07
6.564
NaCHO2
32.88
9.659
a phase of variable composition
LiCHO2
Liquid phase
15.50
6.283
NaCHO2
37.02
11.47
”
LiCHO2
Liquid phase
15.25
6.066
NaCHO2
36.36
11.05
”
LiCHO2
Liquid phase
11.83
4.713
NaCHO2
39.86
12.13
”
LiCHO2
Liquid phase
9.09
3.550
NaCHO2
41.64
12.43
”
LiCHO2
Liquid phase
9.23
3.753
NaCHO2
43.43
13.49
”
LiCHO2
Liquid phase
8.31
3.230
NaCHO2
42.18
12.53
B
LiCHO2
Liquid phase
7.90
3.023
NaCHO2
41.80
12.22
B
LiCHO2
Liquid phase
3.56
1.340
NaCHO2
45.29
13.02
B
LiCHO2
Liquid phase
0.00
0.000
NaCHO2
43.99
11.55
C
LiCHO2
Liquid phase
4.04
1.378
NaCHO2
39.88
10.46
C
LiCHO2
Liquid phase
5.17
1.725
NaCHO2
37.16
9.474
C
LiCHO2
Liquid phase
4.34
1.512
NaCHO2
40.41
10.75
B+C
LiCHO2
Liquid phase
5.84
2.062
NaCHO2
39.64
10.69
B+C
LiCHO2
Liquid phase
8.84
3.023
NaCHO2
34.88
9.113
A+D
Notes:
a
The solid phases are: A = LiCHO
2
•H
2
O ; B = NaCHO
2
;C = NaCHO
2
•2H
2
O; D = NaCHO
2
•
n
H
2
O.
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:
The lithium and sodium formates were prepared by neutralization of formic acid with the corresponding metal hydroxides.
Estimated Errors:
Solubility: No information is given.
Temperature: No information is given.