Ultrasonic study of ternary electrolytic mixtures at 303, 308 and 313K

Ultrasonic velocity (U). viscosity (η) and density (p) of pottassium chloride (KCI), magnesium sulphate (MgSO 4 ) and mercury chloride (HgCl 2 ) mixtures have been measured at different molalities at 303, 308 and 313K. The derived acoustical parameters namely adiabatic compressibility (β), apparent molal compressibility (φ K ) apparent molal volume (φv), limiting apparent molal compressibility (φ K 0 ), limiting apparent molal volume (φv 0 ), and their constants (S K , S V ), viscosity B-coefficient and molal hydration number (H n ) have been computed from the experimental data. The variation in these parameters with respect to the molality of HgCl 2 has been explained on the basis of ion-solvent and structure making/breaking tendency of the electrolytes.