Thermodynamic st udy of th e ternary (EMIm Cl+HCO NH۲+H۲O ) ele ctrolyte system ba sed on p otentiome tric meth od

Recently, ionic liquids due to some g reen charac teristics are of cruci al importance. The presence of ionic liquids (ILs) in different proces ses needs a deeper knowledge about the nonidea lity of these mixtures, essentially about thei r thermody namic behavior [۱].Up to now, the gen eral meth ods such as the isopiestic vapor pressure , gas–liquid chromatography conductmetric and volumetric technique s have been used t o measure the thermo dynamic properties of mixt ures contai ning ionic liquids [۲] .In this work for the first time, the results relating to the thermodynami c properties of ([EMIM]Cl+HC ONH۲+H۲O) system using the potenti ometric method are r eported. The potentio metric measurements were performed in various formamide -water mixed solvent systems containing ۰,۱ ۰,۲۰,۳۰ and,۴۰ mass fractions of formamide over ionic strength ranging from ۰.۰۰ ۲۵ to ۲.۲ mol.kg-۱ at T=۲۹۸.۲K.

کلیدواژه ها:

Activ ity coefficient ، Potentiometric ، Pitzer model ، ionic liquid