ION ASSOCIATION AT LIQUID-VERTICAL-BAR-LIQUID INTERFACES

Ion association at the interface between two immiscible electrolyte so lutions may manifest itself as a marked increase in the interfacial ca pacity, This effect is illustrated by experimental investigations in w hich the ions in the organic phase are varied, while the composition o f the aqueous phase is kept constant. The increase in the capacity is explained by a simple lattice-gas model. The magnitude of this effect depends both on the association constant and the width of the interfac e. (C) 1997 Elsevier Science S.A.