In this work density and viscosity measurements for concentrated solutions in formamide of Bu4NJ, Bu4NBr, Bu4NCl, Pr4NJ salts in the temperature range 25- 80° are reported. The apparent molar volumes are square root linear functions of the salt concentration. The values of the partial molar volumes V2 decrease when the concentration increases and more over are almost constant at the last concentration used. Viscosity data have been analysed using Vand-Einstein model on viscosity of rigid sphere suspensions. In the diluted solution range a different behaviour between tetraalkylammonium salt solutions and alkaline-earth metal ones is shown. This difference is interpreted by supposing that the size of alkaline, alkaline-earth metal solvated cation varies with concentration, while the size of tetraalkylammonium solvated cation is unchangeable
Physico-chemical properties of concentrated solutionsof some tetraalkylammonium salts in formamide in thetemperature range 25-80
BUFO, Sabino Aurelio
1977-01-01
Abstract
In this work density and viscosity measurements for concentrated solutions in formamide of Bu4NJ, Bu4NBr, Bu4NCl, Pr4NJ salts in the temperature range 25- 80° are reported. The apparent molar volumes are square root linear functions of the salt concentration. The values of the partial molar volumes V2 decrease when the concentration increases and more over are almost constant at the last concentration used. Viscosity data have been analysed using Vand-Einstein model on viscosity of rigid sphere suspensions. In the diluted solution range a different behaviour between tetraalkylammonium salt solutions and alkaline-earth metal ones is shown. This difference is interpreted by supposing that the size of alkaline, alkaline-earth metal solvated cation varies with concentration, while the size of tetraalkylammonium solvated cation is unchangeableI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
