IUPAC-NIST Solubilities Database

IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Solubility System: Carbon dioxide with Potassium iodide and Water

Components:
   (1) Potassium bromide; KBr; [7758-02-3]  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:
   Onda, K.; Sada, E; Kobayashi, T.; Kito, S.; Ito, K., J. Chem. Eng. Jpn 1970, 3, 18-24.

Variables:
   Temperature = 298.15 K
   Pressure = 101.325 kPa
   Concentration = c₂/mol dm^-3 = 1.003 - 2.002

Prepared By:
   Pirketta Scharlin

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/dm³]	α	α Note
298.15	0.8290	b,c	0	0.7595	a
298.15	0.7248	b,c	1.003	0.6640	a
298.15	0.6523	b,c	2.002	0.5976	a

Notes:
   ^a  α = Bunsen coefficient [cm³ (STP) cm^-3 atm^-1].
   ^b  L = Ostwald coefficient [cm³ cm^-3]
   ^c  Calculated by the compiler.

Method/Apparatus/Procedure:
   Solutions were made up by weight. Concentration of each solution was verified by measuring the density. (Density was not reported in paper.) A measured volume of gas was brought into contact with a measured quantity of gas-free solvent. Equilibrium was established by agitation using a magnetic stirrer. The volume of remaining gas was measured. The amount of gas absorbed was estimated from change in volume of gas. Details in original paper.

Source and Purity of Materials:
   (1) From commercial cylinder. Purity 99.8 %.
   (2) Analytical grade.
   (3) Distilled and degassed.

Estimated Errors:
   Solubility: δα = ± 2 % (Estimated by the compiler.)
   Temperature: δT/K = ± 0.2 (Estimated by the compiler.)