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Chapter 14

Surface Activity in Nonpolar Media

Adsorption of solute from nonpolar solutions lacks the peculiar mechanism that operates in water. Likewise, the absence of ions in non-polar solutions means that electrostatic charges cannot be conferred by adsorption of ions. Yet charge separation does occur in nonpolar media either by electron or proton exchange. Hence the importance of Lewis acid – Lewis base interaction in such systems. In certain nonaqueous liquids an adsorption effect too minute to be detected by means of the reduction of surface tension or the stability of single bubbles can be revealed by its effect on the rate of rise of a bubble ascending through the solution.

Key Words bubble rise, Hadamard regime,: inverse micelle, low conductivity, nonaqueous, nonpolar media, nonpolar solution, oil-soluble, Stokes regime







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