IUPAC-NIST Solubilities Database

IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Solubility System: Carbon dioxide with Copper sulfate and Water

Components:
   (1) Copper sulfate; CuSO4; [7758-98-7]  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:
   Vázquez, G.; Chenlo, F.; Pereira, G.; Peaguda, J., An. Quim. 1994, 90, 324-28.

Variables:
   Temperature = 293.1 K to 313.1 K
   Pressure = 1.013 bar
   Concentration = m₂/mol kg^-1 = 0.250 - 1.006

Prepared By:
   Pirketta Scharlin

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


T/K	Density ρ [kg/m³]	Density Note	Ostwald coefficient L	Ostwald Note	Concentration C₁ [mol/dm³]	Concentration Note	Molality m₂ [mol/kg]	m₂ Note	γ [g/L]	γ Note
293.1	-	b	0.746	e	0.0310	d	0.250	c	-	a
293.1	-	b	0.646	e	0.0269	d	0.502	c	-	a
293.1	-	b	0.567	e	0.0236	d	0.753	c	-	a
293.1	-	b	0.494	e	0.0205	d	1.006	c	-	a
298.1	1041	b	0.672	e	0.0275	d	0.250	c	40	a
298.1	1079	b	0.580	e	0.0237	d	0.502	c	80	a
298.1	1118	b	0.510	e	0.0208	d	0.753	c	120	a
298.1	1156	b	0.443	e	0.0181	d	1.006	c	160	a
303.1	-	b	0.600	e	0.0241	d	0.250	c	-	a
303.1	-	b	0.508	e	0.0204	d	0.502	c	-	a
303.1	-	b	0.456	e	0.0183	d	0.753	c	-	a
303.1	-	b	0.403	e	0.0162	d	1.006	c	-	a
308.1	-	b	0.529	e	0.0209	d	0.250	c	-	a
308.1	-	b	0.450	e	0.0178	d	0.502	c	-	a
308.1	-	b	0.397	e	0.0157	d	0.753	c	-	a
308.1	-	b	0.352	e	0.0139	d	1.006	c	-	a
313.1	-	b	0.478	e	0.0186	d	0.250	c	-	a
313.1	-	b	0.405	e	0.0158	d	0.502	c	-	a
313.1	-	b	0.364	e	0.0142	d	0.753	c	-	a
313.1	-	b	0.332	e	0.0129	d	1.006	c	-	a

Notes:
   ^a  γ₂ = mass concentration of CuSO₄
   ^b  p = density of aqueous CuSO₄ solution
   ^c  m₂ = molality of CuSO₄; calculated by the compiler.
   ^d  c₁ = solubility of CO₂
   ^e  L = Ostwald coefficient [cm³ cm^-3]

Method/Apparatus/Procedure:
   The apparatus is a combination of previous designs (Refs 1 and 2). It was modified to achieve a more accurate determination of the volume of the absorbent liquid. The apparatus measures the volume of absorbed gas as the volume of mercury that must be supplied to the system in order to restore the initial pressure.
The raw solubility data obtained are gas/ liquid volume ratios. A detailed description of apparatus, method and procedure is given in Ref. 3.

Source and Purity of Materials:
   (1) Commercial, purity 99.5 mole %.
   (2) Merck. Grade not given.
   (3) Distilled and degassed.

Estimated Errors:
   Solubility: δc₁/c₁ < ± 1 % [estimated by compiler on the basis of the information in Ref. 3]
   Temperature: δT/K = ± 0.1
   Pressure: δP/bar = ± 0.001

References:
   1. Alvarez, J.R.; Fernandez, A.; Coll, A., Ing. Quim. 1984, 16, 67.
   2. Haimour, N., J. Chem. Eng. Data 1990, 35, 177.
   3. Vazquez, G.; Chenlo, F.; Pereira, G.; peaguda, J., J. Chem. Eng. Data 1994, 39, 639.