Electric conductance of dispersions of metal oxides in solutions of weak acids in mixed dioxane-water solvents

Marek Kosmulski; Edward Mączka

doi:10.1016/j.jcis.2012.05.005

Electric conductance of dispersions of metal oxides in solutions of weak acids in mixed dioxane-water solvents

J Colloid Interface Sci. 2012 Aug 15;380(1):159-65. doi: 10.1016/j.jcis.2012.05.005. Epub 2012 May 14.

Authors

Marek Kosmulski¹, Edward Mączka

Affiliation

¹ Department of Electrochemistry, Lublin University of Technology, Lublin, Poland. mkosmuls@hektor.umcs.lublin.pl

PMID: 22658358
DOI: 10.1016/j.jcis.2012.05.005

Abstract

The electric conductance of solutions of sulfuric, oxalic, benzoic, and salicylic acid (up to 0.02 M) in dioxane-water mixed solvents (90% and 93% dioxane by mass) has been studied in the presence and absence of TiO(2) and Al(2)O(3) (0.5-5% by mass). TiO(2) and Al(2)O(3) enhanced the conductance of solutions of organic acids in aqueous dioxane. The conductance is interpreted in terms of adsorption of acid in molecular form, dissolution of ceramic oxides in form of anionic complexes, and leaching of acidic impurities from ceramic oxides.