Home
Introduction
Search Menu
IUPAC Series (PDF)
Reference
Version History
About the Project
Disclaimer
Contact Us
Acknowledgements
IUPAC-NIST Solubility Database
NIST Standard Reference Database 106
Solubility System:
Carbon dioxide with Perchloric acid and Water
Components:
(1) Perchloric acid; HClO4; [7601-90-3]
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 - 29.15
Prepared By:
D.M. Mason
Experimental Remarks:
The authors fitted their data up to 6 molal with the equation:
S
m
/S
o
= 0.107 m
2
+ 1/(1 + 0.04282 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
0.764
b
0.753
a
0.4484
0.25
298.15
0.778
b
0.759
a
0.8928
0.50
298.15
0.793
b
0.765
a
1.3332
0.75
298.15
0.809
b
0.772
a
1.7679
0.100
298.15
0.840
b
0.785
a
2.6316
1.50
298.15
0.865
b
0.798
a
3.4779
2.00
298.15
0.984
b
0.835
a
9.7551
4.00
298.15
1.091
b
0.863
a
15.266
6.00
298.15
1.239
b
0.866
a
21.79
10.00
298.15
1.264
b
0.762
a
29.15
15.47
298.15
1.426
b
0.718
a
6.7220
22.84
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 supersaturation.
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.