The surface tensions, interfacial tensions and densities of conjugate solutions of compositions lying in the miscibility gap were measured for two ternary systems, viz. benzene-ethanol-water and n-hexaneacetone-water, at 25 °C.Interfacial and surface phenomena are of considerable importance in situations involving the transfer of matter across liquid-liquid and liquid-vapour interfaces -in adsorption, diffusion, extraction, catalysis, etc. The effect of surface and interfacial tension on such processes was often neglected, not because it was considered unimportant but because tension data were unavailable. Although interfacial and surface tension data exist in the literature for many two-component liquid-liquid systems, information on three-component systems is scarce and only few papers give interfacial and surface tension data for conjugate phases simultaneously.In the present paper, interfacial and surface tension values as well as density values are reported for two three-component two-phase systems, viz. benzene-ethanol-water (BEW) and n-hexane-acetone-water (HAW) at 25 °C, with a view to enriching the volume of experimental data in this field of interest.
EXPERIMENTAL
ChemicalsAll the chemicals, i.e. benzene and acetone of analytical grade, and n-hexane, n-heptane, and ethanol for UV spectroscopy, were supplied by Lachema Brno, Czech Republic. Prior to measurement, the Ternary Systems