Dielectric properties of ammonium salt aqueous solutions

High-frequency dielectric permittivity, dielectric losses and low-frequency conductivity of aqueous solutions of ammonium salts (NH4NO3, NH4BF4, NH4C1O4, NH4SO3NH2, NH4HSO4, (NH4)2SO4, and NH4SCN) were measured at 288, 298 and 308 K. The parameters of the process of the dielectric relaxation (i.e. time τ and enthalpy of activation ΔHε++) were calculated. These values characterize the mobility of water molecules in solutions. The structure-breaking effect is found for all investigated ammonium salts. The variation of this effect for different anions in dependence on factors determining the molecular-kinetic hydration of ions (form, size, charge, etc.) is established.