Physico-chemical studies of the complexes of Hippuric acid with Cu(II), Ni(II), Zn(II), and Pb(II) ions in ethanol-water mixed solvent system

Nabil Bader; Aya Elmajbry; Zainab Al borki; Aziza Ahmida

Physico-chemical studies of the complexes of Hippuric acid with Cu(II), Ni(II), Zn(II), and Pb(II) ions in ethanol-water mixed solvent system

Publish place: Progress in Chemical and Biochemical Research، Vol: 3، Issue: 1

Publish Year: 1399

Type: Journal paper

Language: English

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https://civilica.com/doc/1017100

Document National Code:

JR_PCBR-3-1_001

Index date: 30 May 2020

Physico-chemical studies of the complexes of Hippuric acid with Cu(II), Ni(II), Zn(II), and Pb(II) ions in ethanol-water mixed solvent system abstract

Potentiometric titrations have been used to calculate the dissociation constants of Hippuric acid and its stability constants with Cu(II), Ni(II), Zn(II), and Pb(II) ions in ethanol-water mixed solvent system at different temperatures, and constant ionic strength of 0.1M solution sodium nitrate. The order of the stability constants of metal complexes at 298 K with respect to ligand was found to be Cu(II) > Pb(II) > Zn(II) > Ni(II). Effect of temperature on stability of hippuric acid complexes with Cu(II) and Pb(II) has been studied in order to calculate the Gibb s free energy and enthalpy of the complex formation reaction, the results showed that coordination process is spontanous and exothermic. Effect of solvent ratio has been studied only for Cu(II) complex and the dissociation of hippuric acid at given added different ratios decreases on the following order 75% > 50%.

Physico-chemical studies of the complexes of Hippuric acid with Cu(II), Ni(II), Zn(II), and Pb(II) ions in ethanol-water mixed solvent system Keywords:

Hippuric acid , Metal complexes , stability constant , mixed solvent system

Physico-chemical studies of the complexes of Hippuric acid with Cu(II), Ni(II), Zn(II), and Pb(II) ions in ethanol-water mixed solvent system authors

Nabil Bader

Department of Chemistry, Faculty of Science, University of Benghazi, Benghazi, Libya

Aya Elmajbry

Department of Chemistry, Faculty of Science, University of Benghazi, Benghazi, Libya

Zainab Al borki

Department of Chemistry, Faculty of Science, University of Benghazi, Benghazi, Libya

Aziza Ahmida

Department of Chemistry, Faculty of Science, University of Benghazi, Benghazi, Libya

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Physico-chemical studies of the complexes of Hippuric acid with Cu(II), Ni(II), Zn(II), and Pb(II) ions in ethanol-water mixed solvent system [مقاله ژورنالی]

DOI: 10.33945/SAMI/PCBR.2020.1.1 ...

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