Home
Introduction
Search Menu
IUPAC Series (PDF)
Reference
Version History
About the Project
Disclaimer
Contact Us
Acknowledgements
IUPAC-NIST Solubility Database
NIST Standard Reference Database 106
Solubility System:
Lithium formate with Zinc formate and Water
Components:
(1) Lithium formate; LiCHO2; [556-63-8]
NIST Chemistry WebBook
for detail
(2) Water; H2O; [7732-18-5]
NIST Chemistry WebBook
for detail
(3) Zinc formate; Zn(CHO2)2; [557-41-5]
NIST Chemistry WebBook
for detail
Original Measurements:
Itkina, L.S.; Nadzharyan, K.A., Zh. Neorg. Khim. 24, 2283-5 (1979).
Variables:
Concentration = Composition at 50 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
-Zn(CHO
2
)
2
-H
2
O system at 50 °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
---
---
Zn(CHO2)2
8.38
0.588
A
LiCHO2
Liquid
11.0
2.52
Zn(CHO2)2
5.06
0.388
A
LiCHO2
Liquid
20.95
5.592
Zn(CHO2)2
6.95
0.620
A
LiCHO2
Liquid
25.15
7.326
Zn(CHO2)2
8.78
0.855
A
LiCHO2
Liquid
29.45
9.383
Zn(CHO2)2
10.14
1.080
A
LiCHO2
Liquid
33.16
11.09
Zn(CHO2)2
9.30
1.04
A+B
LiCHO2
Liquid
32.40
10.55
Zn(CHO2)2
8.49
0.924
B
LiCHO2
Liquid
33.35
10.27
Zn(CHO2)2
4.16
0.428
B
LiCHO2
Liquid
36.04
10.845
Zn(CHO2)2
---
---
B
Notes:
a
The solid phases are: A = Zn(CHO
2
)
2
•2H
2
O; B = LiCHO
2
•H
2
O.
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 1-2 weeks. The lithium content of both phases was determined by flame photometry. The zinc content was determined complexometrically. The composition of the solid phases was determined by Schreinemakers' method.
Source and Purity of Materials:
LiCHO
2
•H
2
O was prepared by neutralizing 85% formic acid with suprapure reagent grade LiOH. The crystals were washed with alcohol and dried at 105 °C over H
2
SO
4
in a vacuum. Zn(CHO
2
)
2
•2H
2
O was prepared by the reaction of 85% p.a. grade formic acid with ZnO. It was recrystallized twice from 1% formic acid and dried at 105 °C.
Estimated Errors:
Temperature: The temperature was kept constant to within ± 0.5 °C