IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

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 Solubility System: Carbon dioxide with Sodium formate and Water

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Components:
   (1) Sodium formate; CHO2Na; [141-53-7]  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 = 288.15 K to 333.15 K
   Concentration = c₂/mol dm^-3 = 0 - 4

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	0.1	1.0145	b	1.010	a
15	288.15	0.2	1.034	b	1.028	a
15	288.15	0.5	0.978	b	0.965	a
15	288.15	1	0.970	b	0.945	a
15	288.15	2	0.9875	b	0.933	a
15	288.15	4	1.184	b	1.047	a
20	293.15	0	-	b	0.860	a
20	293.15	0.1	0.890	b	0.885	a
20	293.15	0.2	0.911	b	0.905	a
20	293.15	0.5	0.849	b	0.836	a
20	293.15	1	0.866	b	0.842	a
20	293.15	2	0.879	b	0.829	a
20	293.15	4	1.082	b	0.955	a
25	298.15	0	-	b	0.758	a
25	298.15	0.1	0.783	b	0.778	a
25	298.15	0.2	0.7975	b	0.791	a
25	298.15	0.5	0.754	b	0.741	a
25	298.15	1	0.7695	b	0.747	a
25	298.15	2	0.7875	b	0.741	a
25	298.15	4	0.988	b	0.870	a
30	303.15	0	-	b	0.671	a
30	303.15	0.1	0.692	b	0.687	a
30	303.15	0.2	0.7235	b	0.717	a
30	303.15	0.5	0.674	b	0.662	a
30	303.15	1	0.696	b	0.675	a
30	303.15	2	0.709	b	0.667	a
30	303.15	4	0.918	b	0.806	a
35	308.15	0	-	b	0.605	a
35	308.15	0.1	0.621	b	0.616	a
35	308.15	0.2	0.6525	b	0.646	a
35	308.15	0.5	0.605	b	0.594	a
35	308.15	1	0.631	b	0.611	a
35	308.15	2	0.651	b	0.611	a
35	308.15	4	0.832	b	0.729	a
40	313.15	0	-	b	0.546	a
40	313.15	0.1	0.565	b	0.560	a
40	313.15	0.2	0.583	b	0.583	a
40	313.15	0.5	0.541	b	0.531	a
40	313.15	1	0.5715	b	0.553	a
40	313.15	2	0.578	b	0.542	a
40	313.15	4	0.754	b	0.659	a
45	318.15	0	-	b	0.482	a
45	318.15	0.1	0.510	b	0.505	a
45	318.15	0.2	0.534	b	0.528	a
45	318.15	0.5	0.478	b	0.468	a
45	318.15	1	0.523	b	0.506	a
45	318.15	2	0.5355	b	0.500	a
45	318.15	4	0.691	b	0.602	a
50	323.15	0	-	b	0.436	a
50	323.15	0.1	0.457	b	0.452	a
50	323.15	0.2	0.487	b	0.480	a
50	323.15	0.5	0.456	b	0.447	a
50	323.15	1	0.496	b	0.479	a
50	323.15	2	0.515	b	0.480	a
50	323.15	4	0.670	b	0.582	a
55	328.15	0	-	b	0.392	a
55	328.15	0.1	0.414	b	0.409	a
55	328.15	0.2	0.440	b	0.434	a
55	328.15	1	0.480	b	0.462	a
55	328.15	2	0.490	b	0.456	a
55	328.15	4	0.654	b	0.567	a
60	333.15	0	-	b	0.372	a
60	333.15	0.1	0.378	b	0.373	a
60	333.15	0.2	0.402	b	0.396	a
60	333.15	1	0.451	b	0.433	a
60	333.15	2	0.484	b	0.450	a
60	333.15	4	0.635	b	0.548	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 coefficent, 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 dsicussed 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.

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Last updated: February 18, 2015 (Created: August 17, 2007)