Intermolecular interactions in sulfuric acid-water system

Abstract

Viscosity (ƞ) and density (ρ) of aqueous concentrated sulfuric acid (1.0–9.0) mol dm⁻³ have been measured at 297.65 K and the values of A and B- coefficients of Jones-Dole equation have been calculated from the viscosity data. The value of B-coefficient is positive which suggests a strong ion-solvent interaction in aqueous sulfuric acid. It is assumed that in concentrated aqueous sulfuric acid, HSO₅^3- acts as structure maker. Three concentration regions of sulfuric acid having value of B-coefficient (measure of ion-solvent interaction or structure making capacity) in the order 1.0–4.0 mol dm⁻³ < 4.0–7.0 mol dm⁻³ < 7.0–9.0 mol dm⁻³ have been proposed.