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Thermodynamic studies on metal complexes of Co2 , Ni2 , Cu2 and Cd2 with 8-hydroxy 5-quinolinesulfonic acid in water, methanol and water-methanol binary solvent systems at 303.15 K, 313.15 K and 323.15 K by conductometric method
Research article
  

Thermodynamic studies on metal complexes of Co2+, Ni2+, Cu2+ and Cd2+ with 8-hydroxy 5-quinolinesulfonic acid in water, methanol and water-methanol binary solvent systems at 303.15 K, 313.15 K and 323.15 K by conductometric method


Dhruvi R. Mehta, Raviprakash S. Chandra, Khushbu K. Mehta and M. M. Maisuria

Department of Chemistry, School of Sciences, Gujarat University, Ahmedabad 380009, India


Corresponding author :

Mukesh M. Maisuria,
Department of Chemistry,
School of Sciences, Gujarat University,
Ahmedabad- 380009, India.
Tel.: +91-079-26920261
Email:

Received: April 04, 2014,   Accepted: April 25, 2014,   Published:


Abstract:

Stability constants are measured for complexes of Cd+2, Cu+2, Co+2 and Ni+2 with 8-Hydroxy 5- Quinolinesulfonic acid [HQS] in water, methanol and water-methanol binary solvent systems at 303.15 K, 313.15 K and 323.15 K by conductometric method. The results shows that the stoichiometry of the complexes HQS with Co2+, Cu2+ and Cd2+ metals in all binary mixed solvents is 1:2. The log Kf values of HQS-M+2 complexes in H2O-MeOH binary mixtures increases with increasing % of MeOH and temperature. The ∆H0 and ∆S0 of the complexation reaction in the different H2O-MeOH binary mixtures were evaluated by the temperature dependence of the formation constants using a linear least square analysis according to van’t Hoff equation.


Keywords: 8-Hydroxy 5-QuinolineSulfonic acid; stability constants; complexation; thermodynamic parameters


Citation:

Mukesh M. Maisuria, et al (2014) Thermodynamic studies on metal complexes of Co2+, Ni2+, Cu2+ and Cd2+ with 8-hydroxy 5-quinolinesulfonic acid in water, methanol and water-methanol binary solvent systems at 303.15 K, 313.15 K and 323.15 K by conductometric method. j. of Physical and Chemical Sciences.V1-I2. DOI: 10.15297/JPCS.V1I2.03


Copyright:

© 2014 Mukesh M. Maisuria. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.


      
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      Journal of Physical and Chemical Sciences