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IUPAC-NIST Solubility Database
NIST Standard Reference Database 106
Solubility System:
Copper formate with Yttrium formate and Water
Components:
(1) Copper formate; Cu(CHO2)2; [544-19-4]
NIST Chemistry WebBook
for detail
(2) Water; H2O; [7732-18-5]
NIST Chemistry WebBook
for detail
(3) Yttrium formate; Y(CHO2)3; [15331-71-2]
NIST Chemistry WebBook
for detail
Original Measurements:
Portnova, S.M.; Balakieva, I.V.; Krassilov, Yu. I., Zh. Neorg. Khim. 35, 230-5 (1990).
Variables:
Concentration = Composition at 25 ºC
Prepared By:
Chr. Balarew and St. Trendafilova
Experimental Data:
(Notes on the Nomenclature)
(Please see footnotes following the table(s).)
Solubility values in the Cu(CHO
2
)
2
-Y(CHO
2
)
3
-H
2
O system at 25 °C.
Chemical
1
Phase
Mass Fraction w
1
m
1
[mol kg-1]
a
Chemical
2
Mass Fraction w
2
m
2
[mol kg-1]
a
Solid Phase(s)
b
Cu(CHO2)2
Liquid
9.46
0.680
Y(CHO2)3
---
---
A
Cu(CHO2)2
Liquid
8.73
0.666
Y(CHO2)3
5.92
0.310
A
Cu(CHO2)2
Liquid
8.63
0.707
Y(CHO2)3
11.84
0.665
A
Cu(CHO2)2
Liquid
9.58
0.848
Y(CHO2)3
16.89
1.026
A
Cu(CHO2)2
Liquid
10.83
1.021
Y(CHO2)3
20.07
1.297
A+B
Cu(CHO2)2
Liquid
7.99
0.723
Y(CHO2)3
20.02
1.242
B
Cu(CHO2)2
Liquid
1.61
0.133
Y(CHO2)3
19.70
1.118
B
Cu(CHO2)2
Liquid
0.65
0.053
Y(CHO2)3
19.73
1.106
B
Cu(CHO2)2
Liquid
---
---
Y(CHO2)3
21.41
1.216
B
Notes:
a
The molality values were calculated by the compilers.
b
The solid phases are: A = Cu(CHO
2
)
2
•4H
2
O; B = Y(CHO
2
)
3
•2H
2
O.
Method/Apparatus/Procedure:
The isothermal method was used. One month was allowed for equilibration. The Y
3+
and Cu
2+
contents were determined complexometrically using diethyldithiocarbamate.
1
The composition of the solid phases ws determined by the Schreinemakers method.
Source and Purity of Materials:
The formates were obtained by neutralizing dilute formic acid with p.a. grade Y(OH)
3
and basic copper carbonate.
Estimated Errors:
Temperature: Not given.
References:
1
J. S. Fritz, R. T. Oliver, and D. L. Pietryc, Anal. Chem.
30
, 1111 (1958).