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The literature survey shows that many scientists have been working on ion-ion and ion-solvent interactions in different electrolyte solutions using aqueous and non-aqueous mixtures as the solvents. Their basic approach was first to find out the densities of solvent-mixtures and solutions and then from density data, they have calculated the apparent molar volumes (φv) to explain ion-ion and ion-solvent interactions and slope (Sv) of Masson's equation. φv = φv + Sv√c, where φv is the limiting apparent molar volume and c be the molar concentration. The studies on apparent molar volumes in solvents of low and medium dielectric constants reported that there is a positive slope, on their φv versus √c curves for tetraalkyl ammonium salts. The apparent molar volume work in water and other solvents of high dielectric constants, showed a negative slope in φv versus √c curves for these salts. Many workers tried to solve this peculiar behaviour of the slope (sometimes positive and sometimes negative) of tetraalkyl ammonium salts. In an attempt to get clear picture of Masson's slope, it is worthwhile to investigate how the slope (Sv) observed for some tetraalkyl ammonium salts on formamide would change on increasing the dielectric constants of the solvent by adding suitable quantities of dioxane. We have determined the densities (ρo's) of formamidedioxane mixtures and the densities (ρo's) of some tetraalkyl ammonium iodide solutions in these solvents mixtures by entirely new technique magnetic float densitometer. A Study of Masson's Slope in Dioxane-Formamide Mixture by Magnetic Float Densitometer Using Tetra Alkyl Ammonium Iodides at 25 oC

A Study of Masson's Slope in Dioxane-Formamide Mixture by Magnetic Float Densitometer Using Tetra Alkyl Ammonium Iodides at 25 ºC