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Solubility System: Carbon dioxide with Potassium nitrate and Water (Original Report)

Variables:
Temperature: 273.35 K - 313.15 K
Pressure: 101.325 kPa
Concentration: c2/mol kg-1 = 0 - 3
Prepared By:
D.M. Mason
Experimental Remarks:
The authors fitted their data to equations:
Sm/So = am2 + 1/(1 + bm2), as follows:
t/°C a b
0.2 0.0350 0.170
25 0.0248 0.088
40 0.0343 0.086
Experimental Data:
T (K)T (°C)m2 (mol/kg)α [Note: a]S [Note: b]
273.350.201.70231.7025
273.350.20.11.6681.674
273.350.20.21.6471.6584
273.350.20.51.57331.6012
273.350.211.4611.5142
273.352500.75650.7587
298.15250.10.75010.7552
298.15250.20.74210.75
298.15250.50.71820.7345
298.152510.6860.7156
298.152520.62960.6834
298.152530.58180.6568
298.154000.51330.5173
313.154010.47040.4937
313.154020.4370.4776
313.154030.40830.4642

a) α = Bunsen coefficient [cm3 (STP) cm-3 atm-1].
b) S= Kuenen coefficient [cm3 (STP) g-1(H2O) 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) Analytical grade.
(3) Distilled and degassed..

Estimated Errors

Temperature: δT/K = < ±0.1 at 0.2°C, ±0.03 at other temperatures (authors)
Solubility: δα/α, δS/S = ±0.002 (authors).

References:

No references.

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