Abstract

The Soret effect in dilute aqueous solutions of alkaline earth and nickel chlorides at 25°C has been investigated by the potentiometric method. The molar entropies of transport have been obtained from the measurements of the initial (homoheneous) and final (Soret steady-state) thermoelectric powers. The Soret coefficients at 0.005 M (molarity) have been calculated. The variation of the conventional ionic entropies of transport with the ionic radii is investigated and its possible implications for ionic hydration phenomena are discussed.

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