European Journal of Chemistry 2015, 6(1), 37-43 | doi: https://doi.org/10.5155/eurjchem.6.1.37-43.1146 | Get rights and content

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Conductometric, spectrophotometric and thermodynamic studies of nickel sulfate in aqueous polyvinyl alcohol + methanol systems at different temperatures


Summyia Masood (1,*) , Rehana Saeed (2) , Maria Ashfaq (3)

(1) Department of Chemistry, University of Karachi, Karachi 75270, Pakistan
(2) Department of Chemistry, University of Karachi, Karachi 75270, Pakistan
(3) Department of Chemistry, University of Karachi, Karachi 75270, Pakistan
(*) Corresponding Author

Received: 09 Sep 2014 | Revised: 25 Oct 2014 | Accepted: 25 Oct 2014 | Published: 31 Mar 2015 | Issue Date: March 2015

Abstract


The electrical conductance of nickel sulfate (NiSO4.6H2O) solutions in aqueous, aqueous polyvinyl alcohol (PVOH; 0.1, 0.5 and 0.9 g/dL), aqueous methanol (CH3OH) system (30%, v:v) and aqueous PVOH+CH3OH systems were measured in the concentration ranges 0.4×10-2 to 10×10-2 mol/L, at different temperatures (298, 303, 308, 313 and 318 K). Ionic interactions of nickel sulfate in aqueous and mixed solvent systems were measured by conductometric analysis. Different relations were used to evaluate conductometric data, for the calculation of molar conductance, molar conductance at infinite dilution (Ʌ°m), degree of dissociation (a), dissociation constant (Kd) and Walden product. The increased in Ʌ°mvalues with the increase in percent composition of aqueous PVOH, show that PVOH interaction with solvents (water and methanol) was higher as compare to PVOH interaction with NiSO4. Solvent effect was also studied by spectrophotometric analysis of NiSO4 in aqueous, aqueous PVOH and aqueous PVOH + CH3OH system. Thermodynamic parameters for dissociation process such as energy of activation (Ea#), free energy change of activation (ΔGd#), enthalpy change of activation (ΔHd#), and entropy change of activation (ΔSd#) were also calculated as a function of temperature and solvent composition.


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Editor-in-Chief
European Journal of Chemistry

Keywords


Nickel sulfate; Ionic interaction; Polyvinyl alcohol; Molar conductivity; Spectrophotometric; Thermodynamic parameters

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DOI: 10.5155/eurjchem.6.1.37-43.1146

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Funding information


The Dean of Science (DFS), University of Karachi, Karachi 75270, Pakistan

Citations

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[1]. Summyia Masood, Rehana Saeed, Maria Ashfaq, Samreen Bagum, Rozina Khattak, Sameera Razi Khan
Conductometric Studies of Metal Sulfates in Aqueous, Aq-MeOH, Aq-PVOH, and Aq-PVOH + MeOH Systems
Russian Journal of Physical Chemistry A  95(S2), S365, 2021
DOI: 10.1134/S0036024421150176
/


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How to cite


Masood, S.; Saeed, R.; Ashfaq, M. Eur. J. Chem. 2015, 6(1), 37-43. doi:10.5155/eurjchem.6.1.37-43.1146
Masood, S.; Saeed, R.; Ashfaq, M. Conductometric, spectrophotometric and thermodynamic studies of nickel sulfate in aqueous polyvinyl alcohol + methanol systems at different temperatures. Eur. J. Chem. 2015, 6(1), 37-43. doi:10.5155/eurjchem.6.1.37-43.1146
Masood, S., Saeed, R., & Ashfaq, M. (2015). Conductometric, spectrophotometric and thermodynamic studies of nickel sulfate in aqueous polyvinyl alcohol + methanol systems at different temperatures. European Journal of Chemistry, 6(1), 37-43. doi:10.5155/eurjchem.6.1.37-43.1146
Masood, Summyia, Rehana Saeed, & Maria Ashfaq. "Conductometric, spectrophotometric and thermodynamic studies of nickel sulfate in aqueous polyvinyl alcohol + methanol systems at different temperatures." European Journal of Chemistry [Online], 6.1 (2015): 37-43. Web. 28 Sep. 2023
Masood, Summyia, Saeed, Rehana, AND Ashfaq, Maria. "Conductometric, spectrophotometric and thermodynamic studies of nickel sulfate in aqueous polyvinyl alcohol + methanol systems at different temperatures" European Journal of Chemistry [Online], Volume 6 Number 1 (31 March 2015)

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