Determination of thermodynamic properties of aqueous mixtures of MgCl2 and Mg(NO3)2 by the potentiometric method at T=298.15
Yazarlar (6)
Mohammad Pournaghdy Islamic Azad University, Science And Research Branch, İran
Masoud Giahi Islamic Azad University, Lahijan Branch, İran
Mohammad A. Bagherinia Islamic Azad University, Lahijan Branch, İran
Prof. Dr. Majıd MONAJJEMI Islamic Azad University, Science And Research Branch, İran
Hossein Aghaie Islamic Azad University, Science And Research Branch, İran
Mehran Aghaie Islamic Azad University, North Tehran Branch, İran
Makale Türü Özgün Makale (ESCI dergilerinde yayınlanan tam makale)
Dergi Adı Fluid Phase Equilibria
Dergi ISSN 0378-3812 Wos Dergi Scopus Dergi
Makale Dili İngilizce Basım Tarihi 02-2011
Cilt / Sayı / Sayfa 301 / 1 / 98–104 DOI 10.1016/j.fluid.2010.11.010
Makale Linki http://www.scopus.com/inward/record.url?eid=2-s2.0-78650589594&partnerID=MN8TOARS
Özet
In this research, thermodynamic properties of the ternary electrolyte system (MgCl2+Mg(NO3)2+H2O) were investigated using a potentiometric method. The galvanic cell used had no liquid junction of type: Mg-ISE|MgCl2 (mA), Mg(NO3)2 (mB), H2O|Ag/AgCl. The measurements were performed at T=298.15K and at total ionic strengths from 0.001 to 8.000mol/kg for different series of salt ratios r=mMgCl2/mMg(NO3)2 =1.00, 2.50, 5.00, 7.50, 10.00 and 15.00. The PVC based magnesium ion-selective electrode (Mg-ISE) and the Ag/AgCl electrode used in this work were prepared in our laboratory and showed a reasonably good Nernst response. The Pitzer ion interaction model and Harned rule were used to illustrate the ternary electrolyte system investigated. The experimental results showed that both Pitzer model and Harned rule were suitable to be used satisfactorily to describe this ternary system. © 2010 Elsevier B.V.
Anahtar Kelimeler
Mg(NO3)2 | MgCl2 | Pitzer model | Potentiometric method | Thermodynamic properties