IUPAC-NIST Solubilities Database

IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Solubility System: Carbon dioxide with Potassium nitrate and Water

Components:
   (1) Potassium nitrate; KNO3; [7757-79-1]  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:
   Yasunishi, A.; Yoshida, F., J. Chem. Eng. Data 1979, 24, 11-14.

Variables:
   Temperature = 298.15 K and 308.15 K
   Pressure = 101.325 kPa
   Concentration = c₂/mol L^-1 = 0 - 1.768

Prepared By:
   C.L. Young

Experimental Remarks:

   P = 1 atm = 101.325 kPa = 1.01325 bar

Experimental Data:   (Subscripts 1,2,3, ..., in column headings refer to components 1,2,3, ...)


T/K	Ostwald coefficient L	Ostwald Note	Concentration C₂ [mol/L]
298.15	0.8264	a	0
298.15	0.7994	a	0.288
298.15	0.7592	a	0.801
298.15	0.7399	a	1.101
298.15	0.7164	a	1.412
298.15	0.7023	a	1.630
308.15	0.6675	a	0
308.15	0.6503	a	0.2775
308.15	0.6285	a	0.661
308.15	0.6119	a	0.961
308.15	0.5805	a	1.549
308.15	0.5709	a	1.692
308.15	0.5693	a	1.768

Notes:
   ^a  L = Ostwald coefficient [cm³ cm^-3]

Method/Apparatus/Procedure:
   Volumetric apparatus with multibulb buret and magnetic stirrer. Amount of solution and gas absorbed determined volumetrically. Density and composition of solution determined after absorption. Details in Ref. 1.

Source and Purity of Materials:
   (1) High purity grade sample, purity 99.96 mole %.
   (2,3) Guaranteed reagent, solution degassed by boiling.

Estimated Errors:
   Solubility: δL = ± 1 %
   Temperature: δT/K = ± 0.05

References:
   1. Tokunaga, J., J. Chem. Eng. Data 1975, 20, 41.