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IUPAC-NIST Solubility Database
NIST Standard Reference Database 106
Solubility System:
Carbon dioxide with Water
Components:
(1) Carbon dioxide; CO2; [124-38-9]
NIST Chemistry WebBook
for detail
(2) Water; H2O; [7732-18-5]
NIST Chemistry WebBook
for detail
Original Measurements:
Shedlovsky, T; MacInnes, D.A., J. Am. Chem. Soc. 1935, 57, 1705-10.
Variables:
Temperature = 298.15 K
Pressure = 298.15 K
Prepared By:
H.L. Clever
Experimental Remarks:
A real gas volume of 24.340 dm
3
mol
-1
at 298.15 and 101.325 kPa was used in the calculations. The ideal gas volume would give an Ostwald coefficent value of 0.8250.
It was assumed the solution had the same density as pure water.
Experimental Data:
(Subscripts 1,2,3, ..., in column headings refer to components 1,2,3, ...)
t/°C
T/K
Ostwald coefficient L [cm
3
/cm
3
]
Ostwald Note
Henry's law constant, K [mol/dm
3
·atm
1
]
Henry Constant Note
Mole Fraction (x
1
)
x
1
Note
25
298.15
0.8207
b, c
3372 ± 0.005
a
6.089
b
Notes:
a
K
H
= Henry's constant
b
Calculated by the compiler.
c
L
= Ostwald coefficient
Method/Apparatus/Procedure:
The Henry's constant value was obtained by direct titration of CO
2
saturated solutions, knowledge of the solution vapor pressure and barometer readings.
See footnote 12 on page 1708 of the paper.
Source and Purity of Materials:
(1) Tank. Analyzed to be 99.97 % CO
2
(2) Conductivity water.
Estimated Errors:
Solubility: δ
K
H
/
K
H
= ± 0.005 (compiler)