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IUPAC-NIST Solubility Database
NIST Standard Reference Database 106
Solubility System:
Lithium formate with Scandium formate and Water
Components:
(1) Lithium formate; LiCHO2; [556-63-8]
NIST Chemistry WebBook
for detail
(2) Scandium formate; Sc(CHO2)3; [23405-01-8]
NIST Chemistry WebBook
for detail
(3) Water; H2O; [7732-18-5]
NIST Chemistry WebBook
for detail
Original Measurements:
Petrova, E.V.; Itkina, L.S., Zh. Neorg. Khim. 25, 1668-71 (1980).
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
-Sc(CHO
2
)
3
-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
27.99
7.481
Sc(CHO2)3
---
---
A
LiCHO2
Liquid
26.43
7.918
Sc(CHO2)3
9.33
0.807
A
LiCHO2
Liquid
24.56
8.861
Sc(CHO2)3
22.10
2.302
A
LiCHO2
Liquid
25.31
10.68
Sc(CHO2)3
29.07
3.540
A
LiCHO2
Liquid
24.33
10.45
Sc(CHO2)3
30.87
3.828
A
LiCHO2
Liquid
25.83
11.74
Sc(CHO2)3
31.83
4.176
A
LiCHO2
Liquid
23.62
10.56
Sc(CHO2)3
33.35
4.305
A+B
LiCHO2
Liquid
22.84
9.871
Sc(CHO2)3
32.63
4.070
B
LiCHO2
Liquid
16.49
6.011
Sc(CHO2)3
30.71
3.231
B
LiCHO2
Liquid
10.93
3.305
Sc(CHO2)3
25.43
2.220
B
LiCHO2
Liquid
1.12
0.273
Sc(CHO2)3
19.94
1.403
B
LiCHO2
Liquid
---
---
Sc(CHO2)3
15.90
1.050
B
Notes:
a
The solid phases are: A = LiCHO
2
•H
2
O and B = Sc(CHO
2
)
3
.
Method/Apparatus/Procedure:
The isothermal method was used. Equilibrium was reached in 8.5 days. The lithium content of both phases was determined by flame photometry. The scandium content was determined by complexometric titration. The composition of the solid phase was determined by Schreinemakers' method.
Source and Purity of Materials:
The scandium formate was obtained by heating a mixture of reagent grade Sc
2
O
3
and formic acid. Lithium formate was prepared by reaction of 85% p.a. grade formic acid with p.a. grade LiOH. The crystals were washed with ethanol and dried over sulfuric acid. They were dehydrated by heating in a furnace at 100-110 °C in a nitrogen atmosphere.
Estimated Errors:
Solubility: No information is given.
Temperature: No information is given.