Abstract
The extraction process of 8-quinolinol from CCl4 phase into aqueous HCl solution is investigated, and diffusion constant of 8-quinolinolium ion (H2Ox+) is determined by means of the diagonal schlieren method.
The lower half of the inner wall of a diffusion cell was treated with silicone oil to keep a sharp and stable interface between the aqueous and organic phases. To it was added by a syringe 0.3M 8-quinolinol solution in CCl4 just to the siliconized level, and then an aqueous 0.3N HCl solution was poured carefully thereon. Assuming this time of addition to t=0, the schlieren pattern was recorded on the photograph at the appropriate time intervals and the diffusion constant was calculated according to equations (1)(3).
The diffusion constant obtained for H2Ox+ ion in aqueous HCl solution was 4.37×10-6 cm2·sec-1 for 0.3N HCl at 18.5°C, and 0.325×10-6 cm2·sec-1 for 1.0N HCl at 16.5°C.
