SDS Volume (2082)
Volume 59. Polycyclic Aromatic Hydrocarbons: Binary Non-aqueous Systems, Part II Solutes F-Z, p None
Original Measurements
Sengupta, D.; Pal A.; Lahiri, S. C.; J. Chem. Soc.; Dalton Trans. 1983, 2685-2688.
Variables:
Room Temp: 295 $\pu{K}$
Prepared by:
Method/Apparatus/Procedure:
Constant temperature bath, and an ultraviolet/visable spectrophotometer.
Binary solvent mixtures prepared volumetrically and solvent weight percentages calculated from known densities of the pure solvents at 295 K. Excess solute and solvent allowed to equilibrate for 24 hours in a Campbell solubility apparatus. Saturated solutions were filtered and withdrawn by inversion of the apparatus. Concentrations determined spectrophotometrically at 264 nm.
Source and Purity of Materials:
- Reagent grade, E. Merck, was used as received from chemical supplier.
- Purity and chemical source not specified in paper.
- Purity and chemical source not specified in paper.
Estimated Errors:
Ambient temperature: T/K: ±precision 0.1 (compiler). x2: ±0.001 (compiler). c1: ±3% (relative error; compiler).
Components:
- 1,10-Phenanthroline, $\ce{ C12H8N2 }$; [5144-89-8] NIST WebBook
- Methanol, $\ce{ CH4O }$; [67-56-1] NIST WebBook
- Water, $\ce{ H2O }$; [7732-18-5] NIST WebBook
Experimental Data
| $T$ (°C) | $x_{2}$ | $C_{1}$ (mol/dm3) |
|---|---|---|
| 22.0 | 0.000 | 0.0169 |
| 22.0 | 0.047 | 0.0269 |
| 22.0 | 0.099 | 0.0591 |
| 22.0 | 0.159 | 0.1496 |
| 22.0 | 0.228 | 0.4491 |
| 22.0 | 0.307 | 1.1412 |
| 22.0 | 0.400 | 2.5072 |
| 22.0 | 0.508 | 5.1028 |
| 22.0 | 0.639 | 1.0528 |
(a) x2(s): initial mole fraction of binary solvent mixture; c1: solubility of the solute expressed in terms of molarity. Equilibrium solid phase is probably a hydrated form of 1, 10-phenanthroline, particularly in the water-rich binary solvent mixtures.
