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IUPAC-NIST Solubility Database
NIST Standard Reference Database 106
Solubility System:
Calcium formate with Boric acid and Water
Components:
(1) Boric acid; H3BO3; [10043-35-3]
NIST Chemistry WebBook
for detail
(2) Calcium formate; Ca(CHO2)2; [544-17-2]
NIST Chemistry WebBook
for detail
(3) Water; H2O; [7732-18-5]
NIST Chemistry WebBook
for detail
Original Measurements:
Eremeeva, I.L.; Kalacheva, V.G.; Schwartz, E. M., Zh. Neorg. Khim. 22, 861-2 (1977).
Variables:
Concentration = Composition at 10 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 Ca(CHO
2
)
2
-H
3
BO
3
-H
2
O system at 10 °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
Ca(CHO2)2
Liquid
14.06
1.26
H3BO3
0.0
0.0
A
Ca(CHO2)2
Liquid
13.91
1.28
H3BO3
2.44
0.47
A
Ca(CHO2)2
Liquid
13.84
1.28
H3BO3
3.01
0.59
A
Ca(CHO2)2
Liquid
13.87
1.29
H3BO3
3.27
0.64
A
Ca(CHO2)2
Liquid
13.87
1.28
H3BO3
3.16
0.62
A
Ca(CHO2)2
Liquid
13.74
1.28
H3BO3
3.89
0.76
A
Ca(CHO2)2
Liquid
13.72
1.29
H3BO3
4.30
0.85
A
Ca(CHO2)2
Liquid
13.70
1.29
H3BO3
4.79
0.95
A+B
Ca(CHO2)2
Liquid
10.44
0.94
H3BO3
4.50
0.86
B
Ca(CHO2)2
Liquid
6.02
0.52
H3BO3
4.30
0.78
B
Ca(CHO2)2
Liquid
4.21
0.35
H3BO3
3.99
0.70
B
Ca(CHO2)2
Liquid
3.22
0.27
H3BO3
3.81
0.66
B
Ca(CHO2)2
Liquid
1.08
0.09
H3BO3
3.67
0.62
B
Ca(CHO2)2
Liquid
0.0
0.0
H3BO3
3.52
0.52
B
Notes:
a
The molality values were calculated by the compilers.
b
The solid phases are: A = Ca(CHO
2
)
2
; B = H
3
BO
3
.
Method/Apparatus/Procedure:
The isothermal method was used. Equilibrium was established when a constant pH, diffraction coefficient and concentration of H
3
BO
3
were reached. The Ca
2+
and B
3+
contents were determined as CaO and B
2
O
3
. The composition of the solid phases was determined by the Schreinemakers method.
Source and Purity of Materials:
Ca(CHO
2
)
2
was prepared by reaction of CaCO
3
with CH
2
O
2
. The product was recrystallized twice. Suprapure grade boric acid was used.
Estimated Errors:
Temperature: ± 0.02 °C.