Temperature dependence of translation mobility of water molecules and fluoride ions in aqueous solutions of KF and CsF

Concentration and temperature dependences of fluoride ion and water molecule self-diffusion coefficients in aqueous solutions of potassium and cesium fluorides are investigated by pulse 1H, 19F NMR method. Based on experimental data it is ascertained that the temperature produces a weak effect on fluoride ion positive hydration degree, negative potassium and cesium ion hydration transfers into positive one at 318 and 338 K temperatures, water molecule and fluoride ion self-diffusion activation energies in the solution are similar, cesium ions destroy the structure of water stronger than potassium ions do