HYDRATION AND LOCAL VISCOSITY OF WATER AROUND SINGLY CHARGED IONS IN AQUEOUS SOLUTIONS

The effect of singly charged ions hydration on local viscosity of water around hydrated ions has been examined. The dependence of ions electromobility on the hydration type was used to estimate the mentioned effect. For the ions with negative hydration (K+, Rb+, Cs+, Cl-, Br- and I-) which provide the disordering of water molecules in the nearest surroundings, the local viscosity of water around the ions decreases. For the ions with positive hydration (Li+, Na+ and F-), which provide ordering of water molecules in the nearest surroundings, the water local viscosity increases, causing corresponding changes in their electromobility. The effect of temperature on the local viscosity of water around singly charged ions has been studied and the possibility of changing the hydration type of ions has been demonstrated.