IUPAC-NIST Solubilities Database

IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Solubility System: Carbon dioxide with Arsenic trisufide (colloidal) and Water

Components:
   (1) Arsenic trisufide (colloidal); As2S3; [1303-33-9]  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:
   Findlay, A.; Creighton, H.J.M., J. Chem. Soc. 1910, 97, 536-61.

Variables:
   Temperature = 298.15 K
   Pressure = 100.5 kPa to 170.8 kPa
   Concentration = 10²_γ2/g cm^-3 = 0.392 - 2.289

Prepared By:
   C.L. Young

Experimental Remarks:

   Solubility in water: Ostwald coefficient L = 0.817 cm³ cm^-3

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


T/K	Pressure [bar]	Density ρ [g/cm³]	Keunen coefficient, S	S Note	10² * γ [g/cm³]	γ Note
298.15	1.008	0.997	0.816	b	0.392	a
298.15	1.188	0.997	0.817	b	0.392	a
298.15	1.268	0.997	0.814	b	0.392	a
298.15	1.396	0.997	0.816	b	0.392	a
298.15	1.135	0.997	0.818	b	0.392	a
298.15	1.296	0.997	0.820	b	0.392	a
298.15	1.443	1.003	0.810	b	1.410	a
298.15	1.563	1.003	0.810	b	1.410	a
298.15	1.679	1.003	0.812	b	1.410	a
298.15	1.008	1.003	0.810	b	1.410	a
298.15	1.516	1.003	0.812	b	1.410	a
298.15	1.708	1.003	0.811	b	1.410	a
298.15	1.005	1.007	0.806	b	2.289	a
298.15	1.137	1.007	0.806	b	2.289	a
298.15	1.251	1.007	0.806	b	2.289	a
298.15	1.337	1.007	0.806	b	2.289	a
298.15	1.424	1.007	0.806	b	2.289	a
298.15	1.615	1.007	0.806	b	2.289	a

Notes:
   ^a  γ₂ = mass concentration of arsenic trisulfide
   ^b  S = concentration of gas in liquid phase/concentration of gas in gaseous phase

Method/Apparatus/Procedure:
   Gas burette and absorption pipette similar to that of Geffcken (Ref. 1) except that the manometer tube was longer. Concentration of As₂S₃ determined by precipitation with hydrochloric acid, drying at 80 °C and weighing.

Source and Purity of Materials:
   (1) Purity 99.42 mole %.
   (2) Prepared by passing hydrogen sulfide into arsenic trioxide solution. Hydrogen bubbled through colloidal solution, filtered and partially degassed.
   (3) Nothing specified.

Estimated Errors:
   Solubility: δS = ± 0.25 %
   Temperature: δT/K = ± 0.1

References:
   Geffcken, G.
Z. Phys. Chem., Stoechiom. Verwandtschaftsl. 1904, 49, 257-302.