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Based on Masson's equation we study the molecular interactions between the compositions of the binary solution mixtures for different (%) compositions of Water– Isopropyl alcohol by adding tetraalkyl ammonium iodide at 313.15K. The densities of the solution mixtures (ρ¬s)have been measured very accurately by using Magnetic float Densitometer. The densitometer works on the electrostatic attraction force developed by the passage of current through a solenoid .using this technique, the densities (d¬0¬) of Water – Isopropyl alcohol solvent and mixtures of some tetra alkyl ammonium iodide, viz. Et4NI, Pr4NI, But¬4NI, Pen4NI at 0, 20, 40, 60, 80, 100% compositions (v/v) have been determined experimentally. The apparent molar volumes have been calculated from density data using Masson's equation and graph plotted between ϕv vs √c . The slopes of curves shows that in low dielectric constant medium (i.e, 20% water, =30.76 and 40% water, ∈=42.74 for all the four tetraalkyl ammonium iodide salts have positive slope. But as the dielectric constant of the solvent medium is increased by adding Water – Isopropyl alcohol, further additions of salts in the solution will start contributing towards the volume so the volume will increase on increasing the salt concentration therefore the plot ϕ¬¬¬v+ vs √c curves will give a positive and negative slope the data have been explained on the basis of dielectric constant of the solvent mixtures and size of the electrolyte ion.

international journal of advanced engineering, management and science

Study of the Densities of Some R4NI - Solutions in Water - Isopropyl Alcohol Solvent Mixtures at 313.15 K by Magnetic Float Densitometerz and Then Study Masson’s Equation from Фv Data