IUPAC-NIST Solubilities Database

IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Solubility System: Carbon dioxide with Arsenic trioxide, Arsenic pentoxide, Hydrochloric acid and Water

Components:
   (1) Hydrochloric acid; HCl; [7647-01-0]  NIST Chemistry WebBook for detail
   (2) Arsenic trioxide; As2O3; [1327-53-3]  NIST Chemistry WebBook for detail
   (3) Arsenic pentoxide; As2O5; [1303-28-2]  NIST Chemistry WebBook for detail
   (4) Carbon dioxide; CO2; [124-38-9]  NIST Chemistry WebBook for detail
   (5) Water; H2O; [7732-18-5]  NIST Chemistry WebBook for detail

Original Measurements:
   Robb, R. A.; Zimmer, M. F., J. Chem. Eng. Data 1968, 13, 200-3.

Variables:
   Temperature = 293.15 K to 303.15 K
   Pressure = 40.0 kPa to 112.0 kPa
   Concentration = m₂/mol kg^-1 = 0 - 12.754

Prepared By:
   Pirketta Scharlin

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


t/°C	T/K	Temp Note	α	α Note	Molality m₂ [mol/kg]	Molality m₃ [mol/kg]	Molality m₄ [mol/kg]
20	293.15	a	0.880	b	0.0344	0	0
20	293.15	a	0.85	b	0.0649	0	0
20	293.15	a	0.835	b	0.1113	0	0
20	293.15	a	0.866	b	0	0.0262	0
20	293.15	a	0.865	b	0	0.0509	0
20	293.15	a	0.841	b	0	0.1330	0
20	293.15	a	0.864	b	0.0329	0.0273	0
20	293.15	a	0.854	b	0	0	0.6370
20	293.15	a	0.938	b	0	0	10.971
20	293.15	a	0.924	b	0	0	12.754
20	293.15	a	1.029	b	0.0305	0.0307	0.1271
20	293.15	a	0.854	b	0.0465	0.0159	0.0625
25	298.15	a	0.758 (c)	b	0	0	0
25	298.15	a	0.749	b	0.0344	0	0
25	298.15	a	0.735	b	0.649	0	0
25	298.15	a	0.720	b	0.1113	0	0
25	298.15	a	0.724	b	0.1113	0	0
25	298.15	a	0.756	b	0	0.0262	0
25	298.15	a	0.748	b	0	0.0509	0
25	298.15	a	0.737	b	0	0.1330	0
25	298.15	a	0.744	b	0.0329	0.0273	0
25	298.15	a	0.752	b	0	0	0.1866
25	298.15	a	0.743	b	0	0	0.6370
25	298.15	a	0.728	b	0	0	1.261
25	298.15	a	0.735	b	0	0	2.562
25	298.15	a	0.812	b	0	0	7.459
25	298.15	a	0.818	b	0	0	10.971
25	298.15	a	0.816	b	0	0	12.754
25	298.15	a	0.789	b	0.0305	0.0307	0.1271
25	298.15	a	0.732	b	0.0465	0.0159	0.0625
27.3	300.45	a	0.743	b	0	0	0
30	303.15	a	0.662	b	0.0344	0	0
30	303.15	a	0.651	b	0.0649	0	0
30	303.15	a	0.635	b	0.1113	0	0
30	303.15	a	0.633	b	0.1113	0	0
30	303.15	a	0.663	b	0	0.0262	0
30	303.15	a	0.655	b	0	0.0509	0
30	303.15	a	0.640	b	0	0.1330	0
30	303.15	a	0.649	b	0.0329	0.0273	0
30	303.15	a	0.647	b	0	0	0.6370
30	303.15	a	0.653	b	0.0305	0.0307	0.1271
30	303.15	a	0.650	b	0.0465	0.0159	0.0625

Notes:
   ^a  Added by the compiler.
   ^b  α = Bunsen coefficient [cm³ (STP) cm^-3 atm^-1].
   ^c  Average of five determinations. Standard deviation s_{α = 0.005.} Method/Apparatus/Procedure:
   Volumetric method. The apparatus is described in detail in the source. The CO₂ was purified in the line and sublimed into the system. Mercury levels were read with a cathetometer to ± 0.05 mm. Atmospheric pressures were read to ± 0.1 mm with a mercury barometer and were corrected to 0 °C. The volumes determined were reproducible to ± 0.02 mL.

Source and Purity of Materials:
   (1) Commercial. Purity 99.9 %.
   (2,3) Fisher Certified Reagents. Purity better than 99.3 %.
   (4) Purified. Source not specified.
(5) Conductivity water, distilled from a quartz still. Conductivity less than 1 x 10^-7 Ω^-1 m^-1.

Estimated Errors:
   Solubility: δα = ± 1.1 % (authors)
   Temperature: δT/K = ± 0.05 (authors)