Electrical Conductivity Study of Aqueous Solutions for some Complexes of Manganese, Cobalt, Nickel and Copper Divalent Elements in Different Temperatures
Rafidain Journal of Science,
2021, Volume 30, Issue 4, Pages 19-32
AbstractPreparation of the complexes of some transition metal elements with 1,2-DACH compound and a study its conductivity in water at different temperatures , the determination of its electrolytic behavior and the using of Lee-Wheaton equation in conductivity to study molecular and ionic interference, Determine its type and to calculate the conductivity parameters the ion association constant (KA) , the equivalent conductivity (Λ𝑂) and the equivalent ionic conductivity (𝜆𝑂) at the infinite dilution. As well as calculate the values of distance parameter between ions (R) at the lowest value of the standard deviation (𝜎𝛬) And finding the thermodynamic values Δ𝐻, Δ𝐺 and Δ𝑆. The complexes for 1,2-DACH with Co (II), Ni (II), Cu (II) and Mn (II) were prepared and their identification by electrical conductivity and spectral methods such as U.V.-Vis. spectrum and physical properties such as complex color and melting point. These Including the preparation of aqueous solutions with different concentrations of each of the 1,2-DACH complexes with the metal ions Co (II), Ni (II), Cu (II) and Mn (II) and the study of the electrical conductivity of these complexes and their analysis using the computer program of the Kohlrausch equation to study the electrolytic behavior of the complexes by draw the relationship between the equivalent conductivity and the root of the concentration, The program using the Lee-Wheaton equation for asymmetric electrolytes (2:1) In different temperature degrees (283.16, 288.16, 293.16, 298.16, 303.16, 308.16) K to calculate the values of conductivity parameters (𝝀𝟎𝑴𝟐+) ,( 𝝀𝟎𝑴𝑿+) ,(𝝈𝚲) ,(𝑲𝑨) ,(𝑹) of each complex.
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