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IUPAC-NIST Solubility Database
NIST Standard Reference Database 106
Solubility System:
Carbon dioxide with Hydrochloric acid and Water
Components:
(1) Hydrochloric acid; HCl; [7647-01-0]
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 = 0.1032 MPa
Concentration =
m
2
/mol kg
-1
= 0.01 - 3.00
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 [g/cm
3
]
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
1.0011
c
74.9
e
0.01
b
1.01
f
273.15
a
96.6
d
1.0027
c
74.2
e
0.10
b
1.02
f
273.15
a
96.6
d
1.0189
c
70.7
e
1.00
b
1.07
f
273.15
a
96.6
d
1.0358
c
68.7
e
2.00
b
1.10
f
273.15
a
96.6
d
1.0520
c
66.6
e
3.00
b
1.13
f
298.15
a
94.2
d
0.9977
c
31.9
e
0.01
b
1.01
f
298.15
a
94.2
d
0.9992
c
31.8
e
0.10
b
1.01
f
298.15
a
94.2
d
1.0144
c
30.9
e
1.00
b
1.04
f
298.15
a
94.2
d
1.0303
c
29.4
e
2.00
b
1.09
f
298.15
a
94.2
d
1.0452
c
28.6
e
3.00
b
1.12
f
323.15
a
85.4
d
0.9888
c
16.6
e
0.01
b
1.00
f
323.15
a
85.4
d
0.9903
c
16.6
e
0.10
b
1.01
f
323.15
a
85.4
d
1.0050
c
16.3
e
1.00
b
1.02
f
323.15
a
85.4
d
1.0204
c
16.0
e
2.00
b
1.04
f
323.15
a
85.4
d
1.0347
c
15.6
e
3.00
b
1.06
f
348.15
a
60.3
d
0.9760
c
8.1
e
0.01
b
1.00
f
348.15
a
60.3
d
0.9775
c
8.0
e
0.10
b
1.01
f
348.15
a
60.3
d
0.9924
c
7.9
e
1.00
b
1.02
f
348.15
a
60.3
d
1.0079
c
7.9
e
2.00
b
1.03
f
348.15
a
60.3
d
1.0244
c
7.7
e
3.00
b
1.05
f
363.15
a
30.1
d
0.9656
c
3.5
e
0.01
b
1.00
f
363.15
a
30.1
d
0.9724
c
3.4
e
0.10
b
1.00
f
363.15
a
30.1
d
0.9896
c
3.4
e
1.00
b
1.01
f
363.15
a
30.1
d
0.9975
c
3.4
e
2.00
b
1.02
f
363.15
a
30.1
d
1.0214
c
3.3
e
3.00
b
1.03
f
Notes:
a
Calculated by the compiler.
b
m
2
= molality of HCl
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) Hydrochloric acid solutions were prepared by diluting concentrated HCl and standardizing the solution by titration. HCl was analytical reagent-grade which met ACS specifications.
(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