IUPAC-NIST Solubility Database
NIST Standard Reference Database 106


Glass Ball as Bullet Solubility System: Carbon dioxide with Ferric hydroxide (colloidal) and Water

Components:
   (1) Ferric hydroxide (colloidal); Fe(OH)3; [1309-33-7]  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:
   Gatterer, A., J. Chem. Soc. (London) 1926, 129, 299-316.

Variables:
   Temperature = 278.12 K to 298.15 K
   Concentration = c2/mol L-1 = 0 - 0.967

Prepared By:
   Pirketta Scharlin

Experimental Data:   (Subscripts 1,2,3, ..., in column headings refer to components 1,2,3, ...)
  
t/°CT/KTemp NoteOstwald coefficient LOstwald NoteConcentration C2 [mol/L]Concentration Note
4.97278.12a1.446c0b
4.97278.12a1.471c0.071b
4.97278.12a1.503c0.144b
4.97278.12a1.534c0.293b
4.97278.12a1.584c0.513b
4.97278.12a1.680c0.967b
9.95283.10a1.240c0b
9.95283.10a1.267c0.071b
9.95283.10a1.297c0.144b
9.95283.10a1.326c0.293b
9.95283.10a1.379c0.513b
9.95283.10a1.470c0.967b
14.96288.11a1.070c0b
14.96288.11a1.095c0.071b
14.96288.11a1.123c0.144b
14.96288.11a1.154c0.293b
14.96288.11a1.204c0.513b
14.96288.11a1.291c0.967b
19.98293.13a0.936c0b
19.98293.13a0.9610c0.071b
19.98293.13a0.9870c0.144b
19.98293.13a1.016c0.293b
19.98293.13a1.066c0.513b
19.98293.13a1.149c0.967b
25.00298.15a0.826c0b
25.00298.15a0.8533c0.071b
25.00298.15a0.8764c0.144b
25.00298.15a0.9063c0.293b
25.00298.15a0.9526c0.513b
25.00298.15a1.032c0.967b
Notes:
   a  Calculated by the compiler.
   b  c2 means the concentration of entities 1/3 Fe(OH)3. c2 = c{1/3 Fe(OH) 3} M{1/3 Fe(OH) 3} = 35.621 g mol-1

Author: "Although it is uncertain whether the colloids in question have definite chemical formula, yet for the sake of clearness the gram-equivalent of ferric hydroxide was taken as 1/3 Fe(OH) 3 = 35.621."
   c  L = Ostwald coefficient [cm3 cm-3]. The values represented in table are mean values of measurements.

Method/Apparatus/Procedure:
   The method of Ostwald was employed.1 The solutions were freed from air by boiling in a vacuum and, without contact with air, transferred to the vaccum mixing vessel at 25 °C. The gas was saturated with water vapor at the same temperature. Five measurements were made with a given solution at five different temperatures, the process being repeated after an interval of several hours to check the former result.

Source and Purity of Materials:
   (1) Carefully washed. Purity of CO2 was confirmed by the value obtained for its solubility in distilled water.
   (2) A solution of pure ferric hydroxide in acetic acid was diluted and boiled until the ratio of acetic acid to ferric hydroxide became 1:30 - 1:60. The solution was then evaporated under reduced pressure.
   (3) Not specified.

Estimated Errors:
   Solubility: δL/L = ± 0.004 (by author)

References:
   1. Ostwald, W. ; Luther, R. Handbuch der Physicochemischen Mussungen, 3rd ed. 1910, p. 246.