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IUPAC-NIST Solubility Database
NIST Standard Reference Database 106
Solubility System:
Carbon dioxide with Sulfuric acid and Water
Components:
(1) Sulfuric acid; H2SO4; [7664-93-9]
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:
Markham, A.A.; Kobe, K.A., J. Am. Chem. Soc. 1941, 63, 1165-6.
Variables:
Temperature = 298.15 K
Pressure = 101.325 kPa
Concentration = 10
2
x
2
= 0 - 100
Prepared By:
D.M. Mason
Experimental Remarks:
The authors fitted their data up to 10 molal with the equation: S
m
/S
o
= 0.0885 m
2
+ 1/(1 + 0.2159 m
2
) Maximum error of the equation was about 1 %.
Experimental Data:
(Subscripts 1,2,3, ..., in column headings refer to components 1,2,3, ...)
T/K
Keunen coefficient, S
S Note
α
α Note
10
2
* Mole Fraction (x
2
)
Molality m
2
[mol/kg]
298.15
0.7587
b
0.7565
a
0.0000
0.0
298.15
0.7127
b
0.6983
a
0.8928
0.5
298.15
0.6911
b
0.6650
a
1.7679
1.0
298.15
0.6610
b
0.6132
a
3.4779
2.0
298.15
0.6546
b
0.5854
a
5.1277
3.0
298.15
0.6659
b
0.5740
a
6.7220
4.0
298.15
0.7332
b
0.5878
a
9.7551
6.0
298.15
0.8238
b
0.6159
a
12.597
8.0
298.15
0.9053
b
0.6337
a
15.266
10.0
298.15
1.0372
b
0.6404
a
20.32
14.15
298.15
1.1453
b
0.6225
a
25.37
18.86
298.15
1.3386
b
0.5840
a
33.77
28.29
298.15
1.5573
b
0.5659
a
40.48
37.72
298.15
2.1232
b
0.5741
a
50.49
56.58
298.15
-
b
0.645
a
62.95
94.30
298.15
-
b
0.753
a
77.26
188.6
298.15
-
b
0.813
a
83.60
282.9
298.15
-
b
0.880
a
91.07
565.8
298.15
-
b
0.920
a
95.32
1131.6
298.15
-
b
0.960
a
100
-
Notes:
a
α = Bunsen coefficient [cm
3
(STP) cm
-3
atm
-1
].
b
S
= Kuenen coefficient [cm
3
(STP) g
-1
(H
2
O) atm
-1
].
Method/Apparatus/Procedure:
The principle of the Ostwald method was used in which the gas is agitated with a measured quantity of gas-free liquid and the decrease in volume of solution-saturated gas is measured in a burette over mercury. The pressure was adjusted to yield one atmosphere partial pressure of carbon dioxide. The volume of gas was reduced to 0°C by the ideal gas law. Experiments were conducted to show that the agitation did not cause super-saturation.
Source and Purity of Materials:
(1) Commercial cylinder, 99.8 % pure.
(2) Baker, cp analyzed (ACS).
(3) Distilled.
Estimated Errors:
Solubility: δα/α, δS/S = ± 0.002 (authors).
Temperature: δ
T
/K = ± 0.03 (authors)
References:
1. Markham, A.A.; Kobe, K.A., J. Am. Chem. Soc. 1941, 63, 449-54.