Riami
La conductiviti, la densit et la vise&b de systemes constituks du mblange eutectique NH4NOI-LiNOg-NH&Cl et d'cau ont itb mesurks dans tout le domaine de concentration allant de la solution aqueuse diluke au se1 fondu pur. Un maximum de conductivitt se manifeste pour une fraction molaire en eau (Xmo) de 0.835. La viscosite augmeute t&s fortement de XH*O = 0.2 a Xmo = 0 tandis que le produit de Walden reste approximativement constant de X,,, = 1 B XHzO = 0.2. Ces resultats sont disc&s, la concentration au maximum de conductiviti correspond a une quantid d'eau suffisante pour assurer B chaque ion sa couche d'hydratation primaire.
Abstract -The conductivity, the specific mass and the viscosity of mixtures of water and the eutectic system NH,NO,-LiNO,-NH,CI have been measured at concentrations ranging from dilute aqueous solutions to the pure molten salt. The conductivity reaches a maximum value at a molar fraction of water (X,,,) of 0.835. The viscosity of the mixtures raises strongly from XHIO = 0.2 to Xmo = 0, the Walden product remains approximately constant from X,,, = 1 to X,,, = 0 2. The results are discussed, the water content at the conductivity maximum is sutlkient to ensure the primary hydration of all the ions of the solution.