Investigation of Magnesium (II), Calcium (II) and Barium (II) Complexes in Aqueous Solution

Show simple item record Bakr, Mustafa Farag [مصطفى فرج بكر] en_US Mohamed Abd Allah A. [عبد الله عبد الوهاب محمد] en_US
date.accessioned 2009-11-25T15:26:59Z en_US
date.available 2009-11-25T15:26:59Z en_US
date.issued 2005 en_US
identifier.citation Qatar University Science Journal, 2005, Vol. 25, Pages 88-97. en_US
identifier.uri en_US
description.abstract The ionic association constants, K6, of Mg, Ca and Ba metal ions with succinate, malate and tartrate ligands were conduct metrically determined in water at 25-40°C. The conductometric data were analysed by the Shedlovsky extrapolation method. The KE values tend to decrease with the cation size in the order Ca > Ba for all the salts under study with the exception of Mg salts, whereas the KA values for the ligands increase in the order succinate < malate < tartrate. poi the salts under study, standard thermodynamic functions, AH° and AS" for the association, were evaluated and discussed. The positive values of both AH" and AS' in all the systems indicate the ionic association processes are the reactions of unfavorable enthalpy and favorable entropy changes in aqueous solution. The thermodynamic metal gradient, B, was evaluated and its significance of ion association of all salts under investigation was discussed. On the other hand, the results of limiting molar conductancs, Ao, are discussed on the light of Walden product. en_US
language.iso en en_US
publisher Qatar University en_US
subject Chemistry en_US
subject الكيمياء ar
title Investigation of Magnesium (II), Calcium (II) and Barium (II) Complexes in Aqueous Solution en_US
title.alternative دراسة توصيلية لمتراكبات المغنيسيوم والكالسيوم والباريوم الثنائي في المحلول المائي ar
type Article en_US
identifier.pagination 88-97 en_US
identifier.volume 25 en_US

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