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 iodide; KI; [7681-11-0]  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:
   Gerecke, J., Diss. Dr. rer. Nat. 1969, Hochsch. "Carl Schorlemmer", Leuna-Merseburg, DDR.

Variables:
   Temperature = 288.15 K to 333.15 K
   Pressure = 101.325 kPa
   Concentration = c₂/mol dm^-3 = 0 - 5

Prepared By:
   D.M. Mason

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


t/°C	T/K	Concentration C₂ [mol/dm³]	Keunen coefficient, S	S Note	α	α Note
15	288.15	0	-	b	0.990	a
15	288.15	0.5	0.978	b	0.952	a
15	288.15	1	0.938	b	0.894	a
15	288.15	2	0.892	b	0.808	a
15	288.15	5	0.920	b	0.699	a
20	293.15	0	-	b	0.860	a
20	293.15	0.5	0.845	b	0.820	a
20	293.15	1	0.818	b	0.771	a
20	293.15	2	0.758	b	0.685	a
20	293.15	5	0.864	b	0.655	a
25	298.15	0	0.5173	b	0.758	a
25	298.15	0.5	0.742	b	0.719	a
25	298.15	1	0.713	b	0.678	a
25	298.15	2	0.682	b	0616	a
25	298.15	5	0.788	b	0.588	a
30	303.15	0	-	b	0.671	a
30	303.15	0.5	0.650	b	0.626	a
30	303.15	1	0.6275	b	0.595	a
30	303.15	2	0.608	b	0.548	a
30	303.15	5	0.7085	b	0.535	a
35	308.15	0	-	b	0.605	a
35	308.15	0.5	0.5755	b	0.556	a
35	308.15	1	0.5475	b	0.518	a
35	308.15	2	0.508	b	0.457	a
35	308.15	5	0.6565	b	0.494	a
40	313.15	0	-	b	0.546	a
40	313.15	1	0.489	b	0.462	a
40	313.15	2	0.466	b	0.418	a
40	313.15	5	0.642	b	0.4814	a
45	318.15	0	-	b	0.482	a
45	318.15	0.5	0.462	b	0.4456	a
45	318.15	1	0.437	b	0.412	a
45	318.15	2	0.416	b	0.372	a
45	318.15	5	0.6085	b	0.456	a
50	323.15	0	-	b	0.436	a
50	323.15	1	0.386	b	0.363	a
50	323.15	2	0.3606	b	0.322	a
55	328.15	0	-	b	0.392	a
55	328.15	0.5	0.375	b	0.361	a
55	328.15	1	0.348	b	0.327	a
55	328.15	2	0.332	b	0.296	a
55	328.15	5	0.531	b	0.396	a
60	333.15	0	-	b	0.372	a
60	333.15	0.5	0.332	b	0.3188	a
60	333.15	1	0.307	b	0.288	a
60	333.15	2	0.282	b	0.251	a
60	333.15	5	0.4885	b	0.3615	a

Notes:
   ^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 a measured volume of gas-free liquid is stirred in the presence of the gas, and its decrease in volume is measured in a burette over mercury. The volume of liquid was measured at the experimental temperature. For calculation of the Kuenen coefficient, the density of the solution was obtained from Landolt-Börnstein extant 1969. The molar concentration of salt in the liquid was standardized at 20°C. These data are analyzed and discussed further in Ref. 1.

Source and Purity of Materials:
   (1)VEB Leuna Works; 99.8 vol %; the impurity was mostly water (author).
   (2) DDR pro analysis grade by DDR Standard TGL 5021.
   (3) Double distilled.

Estimated Errors:

   Temperature: Not given.

References:
   1. Gerecke, J.; Bittrich, H.J., Wiss. Z. Tech. Hochsch. Chem. "Carl Schorlemmer" Leuna-Merseburg 1971, 13(2), 115-22.