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IUPAC-NIST Solubility Database
NIST Standard Reference Database 106
Solubility System:
Cadmium formate with Sodium hydroxide and Water
Components:
(1) Cadmium formate; Cd(CHO2)2; [4464-23-7]
NIST Chemistry WebBook
for detail
(2) Sodium hydroxide; NaOH; [1310-73-2]
NIST Chemistry WebBook
for detail
(3) Water; H2O; [7732-18-5]
NIST Chemistry WebBook
for detail
Original Measurements:
Gyunner, E.A.; Melnichenko, N.D.; Yakhkind, N.D.; Velmozhnii, I.S.; Katseva, G.N., Zh. Neorg. Khim. 24, 2172-2175 (1979).
Variables:
Concentration = Composition at 20 ºC
Prepared By:
Chr. Balarew and St. Trendafilova
Experimental Data:
(Notes on the Nomenclature)
(Please see footnotes following the table(s).)
Ratio OH
-
: Cd
2+
in the liquid phase in the Cd(CHO
2
)
2
- NaOH - H
2
O system at 20 °C.
Chemical
1
Phase
10
0
* Mole Fraction
1
Chemical
2
Mole Fraction
2
Solid Phase(s)
a
NaOH
Liquid
10.0
Cd(CHO2)2
0.95
A
NaOH
Liquid
15.0
Cd(CHO2)2
1.01
A
NaOH
Liquid
20.0
Cd(CHO2)2
1.03
A
NaOH
Liquid
25.0
Cd(CHO2)2
1.02
A
NaOH
Liquid
30.0
Cd(CHO2)2
1.01
A
NaOH
Liquid
33.3
Cd(CHO2)2
1.02
A
NaOH
Liquid
40.0
Cd(CHO2)2
1.04
variable composition
NaOH
Liquid
45.0
Cd(CHO2)2
1.11
variable composition
NaOH
Liquid
50.0
Cd(CHO2)2
1.21
variable composition
NaOH
Liquid
55.0
Cd(CHO2)2
1.41
variable composition
NaOH
Liquid
60.0
Cd(CHO2)2
1.63
variable composition
NaOH
Liquid
62.5
Cd(CHO2)2
---
variable composition
NaOH
Liquid
65.0
Cd(CHO2)2
---
variable composition
NaOH
Liquid
66.7
Cd(CHO2)2
2.00
B
NaOH
Liquid
70.0
Cd(CHO2)2
2.01
B
NaOH
Liquid
75.0
Cd(CHO2)2
1.96
B
NaOH
Liquid
80.0
Cd(CHO2)2
1.97
B
NaOH
Liquid
85.0
Cd(CHO2)2
2.05
B
NaOH
Liquid
90.0
Cd(CHO2)2
2.05
B
Notes:
a
The solid phases are: A = Cd(OH)(CHO
2
); B = Cd(OH)
2
.
Method/Apparatus/Procedure:
The system is studied by the method of physico-chemical analysis. After attaining the equilibrium, the residue concentrations of Cd
2+
and OH
-
are measured and also refractive index (
n
) of the liquid phases. The methods of measurements are according to Ref. 1.
Source and Purity of Materials:
The cadmium formate is obtained from cadmium carbonate and formic acid. The obtained product is twice recrystallized.
Estimated Errors:
Temperature: t =±0.05 °C.
References:
1
E. A. Gyunner, N. D. Melnichenko, N. D. Yakhkind, G. N. Bobrishev, and G. N. Katseva, Zh. Neorg. Khim.
23
, 711 (1978).