?p-DIMETHYLAMINOBENZALDEHYDRAZONE DERIVATIVES AS INDICATORS

Authors

  • SAMIR M. EL- MEDANI Department of Chemistry, Faculty of Science, Cairo University, El-Fayoum, Egypt
  • NABILA M. EL- MALLAH Department of Chemistry, Faculty of Science, Cairo University, El-Fayoum, Egypt

Keywords:

Hydrazones, Cu2 , Acid-base indicator.

Abstract

Two hydrazones were subjected to study. The first hydrazone was the p-dimethylaminobenzalde-
hyde-benzoylhydrazone (DMB). This hydrazone was used to determine Cu2+ by spectrophotometric method. This
method depends on the extraction of Cu-DMB complex in chloroform. Maximum absorption was attained at 440 nm
at pH 7-10. The second hydrazone, p-dimethylaminobenzaldehyde-p-nitrophenylhydrazone (DMN) was tested as an
acid-base indicator. DMN compound was studiedin UV andvisible regions atdifferent pH-values. DMN compound
was found to have two pK, values, 3.31 and 9.1. DMN was tested as acid-base indicator. It gave satisfied results for
(1) strong acid-strong base system (2) strong acid-weakbase system (3) weak acid-strong base system.The result was
found to have maximum error 2% with maximum standard deviation 1.59.

Published

1995-10-23

Issue

Vol. 38 No. 9-10 (1995): Pakistan Journal of Scientific and Industrial Research

Section

Articles

How to Cite

?p-DIMETHYLAMINOBENZALDEHYDRAZONE DERIVATIVES AS INDICATORS. (1995). Biological Sciences - PJSIR, 38(9-10), 333-336. https://www.v2.pjsir.org/index.php/biological-sciences/article/view/2514