Abstract
Diffusion coefficients of Methyl Orange, Ethyl Orange, Propyl Orange, and Butyl Orange in 0.03M NaCl, and 0.025M dodecyltrimethylammonium bromide have been obtained by means of diaphragm diffusion procedures with a Stokes'type cell. In NaCl solution, the radii of diffusion particles of MO, EO, PO, and BO are 4.01, 4.33, 5.05, and 6.02×10-8cm, respectively. Diffusion coefficients of MO and PO in the surfactant solution are 2.15 and 2.24×10-6cm2 sec-1, respectively. MO and PO diffuse with the surfactant micell having about 12×10-8cm radius.
