SELF-DIFFUSION AND CONDUCTANCE STUDIES OF ACETONITRILE - WATER SOLUTIONS OF TETRAETHYLAMMONIUM IODIDE

The self-diffusion coefficients of acetonitrile, water and iodide ion and the conductance of Et4NI have been measured at 25.0°C in acetonitrile water mixtures for the whole composition range of the binary solvent, for the salt molarity ranging from 3·10-5 to 1·10-2. The decrease of the self-diffusion coefficients of water and of acetonitrile in the presence of Et4NJ results from the increase of the solution viscosity. The lack of the effect of Et4NI on the microphase separation of the acetonitrile-water mixtures has been observed.