Journal of Chemistry

Journal of Chemistry / 2005 / Article

Open Access

Volume 2 |Article ID 825847 | https://doi.org/10.1155/2005/825847

Miss Krishna Purohit, K. K. Desai, "2-Hydroxy-4-Methoxybenzophenone Oxime as an Analytical Reagent for Copper(II)", Journal of Chemistry, vol. 2, Article ID 825847, 4 pages, 2005. https://doi.org/10.1155/2005/825847

2-Hydroxy-4-Methoxybenzophenone Oxime as an Analytical Reagent for Copper(II)

Received26 Feb 2005
Accepted25 Mar 2005

Abstract

2-Hydroxy-4-methoxybenzophenoneoxime (HMBO) was developed as a new analytical reagent for the gravimetric determination of Cu(II). In pH 2.5-9.0 the reagent gives brown coloured precipitate with Cu(II). Spectrophotometric methods revealed that the stoichiometry of the complex is 1:2 (metal: ligand). Beer's law is obeyed up to 31.75 ppm of Cu(II). Molar absorptivity and Sandell's sensitivity at 400 nm were found to be 7.0×102 L mol-1 cm-1 and 0.090 μg/cm2 respectively. The stability constant of Cu(II)-HMBO complex is found to be 6.13×109. Gibb’s free energy change for complex formation reaction was found to be -13.93 Kcal/mol. The reagent can be used for the analysis of brass.

Copyright © 2005 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


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