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IUPAC-NIST Solubility Database
NIST Standard Reference Database 106
Solubility System:
Carbon dioxide with Calcium chloride and Water
Components:
(1) Calcium chloride; CaCl2; [10043-52-4]
NIST Chemistry WebBook
for detail
(2) Carbon dioxide; CO2; [124-38-9]
NIST Chemistry WebBook
for detail
(3) Water; H2O; [7732-18-5]
NIST Chemistry WebBook
for detail
Original Measurements:
He, S.; Morse, J.W., Geochim. Cosmochim. Acta 1993, 57, 3533-54.
Variables:
Temperature = 273.15 K to 363.15 K
Pressure = 273.15 K to 363.15 K
Concentration =
m
2
/mol kg
-1
= 0.1 - 5.004
Prepared By:
Pirketta Scharlin
Experimental Data:
(Subscripts 1,2,3, ..., in column headings refer to components 1,2,3, ...)
T/K
Temp Note
10
2
* Pressure [atm]
Pressure Note
Density ρ [1.0214]
Density Note
10
3
* Molality m
1
[mol/kg]
m
1
Note
Molality m
2
[mol/kg]
m
2
Note
γ
γ Note
273.15
a
96.6
d
1.0214
c
69.7
e
0.104
b
1.08
f
273.15
a
96.6
d
1.0908
c
53.7
e
1.021
b
1.40
f
273.15
a
96.6
d
1.1696
c
34.6
e
2.036
b
2.18
f
273.15
a
96.6
d
1.2263
c
25.7
e
2.998
b
2.93
f
273.15
a
96.6
d
1.2991
c
16.9
e
4.027
b
4.45
f
273.15
a
96.6
d
1.3505
c
10.4
e
5.001
b
7.25
f
298.15
a
94.2
d
1.0118
c
30.1
e
0.102
b
1.07
f
298.15
a
94.2
d
1.1603
c
21.4
e
1.001
b
1.50
f
298.15
a
94.2
d
1.1607
c
14.2
e
2.002
b
2.25
f
298.15
a
94.2
d
1.2290
c
9.9
e
3.001
b
3.25
f
298.15
a
94.2
d
1.3449
c
6.7
e
5.004
b
4.80
f
323.15
a
85.4
d
1.0143
c
14.1
e
0.105
b
1.05
f
323.15
a
85.4
d
1.0809
c
10.2
e
0.976
b
1.25
f
323.15
a
85.4
d
1.1435
c
7.9
e
1.849
b
1.69
f
323.15
a
85.4
d
1.2008
c
6.3
e
2.706
b
1.85
f
323.15
a
85.4
d
1.3321
c
4.2
e
4.958
b
2.56
f
348.15
a
60.3
d
0.9957
c
7.7
e
0.1.1
b
1.04
f
348.15
a
60.3
d
1.0639
c
7.5
e
0.999
b
1.08
f
348.15
a
60.3
d
1.1345
c
6.9
e
2.001
b
1.17
f
348.15
a
60.3
d
1.2000
c
6.7
e
3.001
b
1.20
f
348.15
a
60.3
d
1.3127
c
5.8
e
5.001
b
1.38
f
363.15
a
30.1
d
0.9915
c
6.6
e
0.1
b
1.05
f
363.15
a
30.1
d
1.0567
c
6.4
e
1.0
b
1.07
f
363.15
a
30.1
d
1.1245
c
6.1
e
2.0
b
1.14
f
363.15
a
30.1
d
1.1874
c
5.9
e
3.0
b
1.17
f
363.15
a
30.1
d
1.2987
c
5.6
e
5.0
b
1.22
f
Notes:
a
Calculated by the compiler.
b
m
2
= molality of CaCl
2
c
p
= density of solvent
d
p
1
= partial pressure of CO
2
e
m
1
= molality of CO
2
f
γ
1
= activity coefficient of CO
2
Method/Apparatus/Procedure:
Either pure CO
2
gas or CO
2
-N
2
mixtures were used in the experiments to maintain a constant P(CO
2
). The CO
2
-N
2
mixtures were made by pumping predetermined amounts of CO
2
and N
2
into a gas tank and their composition was verified by gas chromatography.
CO
2
or CO
2
-N
2
gas mixtures were equilibrated with the aqueous solutions in a series of stirred water-jacketed reaction vessels with condensers. The gas was premoistured by first passing it through distilled water at the temperature of experiment. Fine bubbles were obtained by using gas-dispersion tubes. The bubbling rate was 90- 95 mL min
-1
.
The mole fraction of CO
2
in the CO
2
-N
2
mixture was determined using a Hewlett Packard (5790A) gas chromatograph.
Source and Purity of Materials:
(1) Commercial; purity 99.9 %
(2) Source not mentioned. Analytical reagent-grade which met ACS specifications. CaCl
2
x 2H
2
O was weighed and dissolved in water. The concentration of CaCl
2
in solutions was determined by analyzing Cl
-
concentration via AgNO
3
titration in stock solutions.
(3) 18 MΩ water obtained from a Milli-Q Super-Q water system.
Estimated Errors:
Solubility: δ
m
1
/m
1
= ± 0.012
δγ
1
/γ
1
= ± 0.04
Temperature: δ
T
/K = ± 0.1