TY - JOUR ID - 94127 TI - A Study of the Component Formats Effect on I,onization Constants for A Number Schiff Pyridine Water and Ethanol with Variant Temperature Degrees JO - Egyptian Journal of Chemistry JA - EJCHEM LA - en SN - 0449-2285 AU - Merie, Fedaa AD - Lecturer, Department of Chemistry, College of Education for Pure Sciences, University of Mosul, Iraq Y1 - 2020 PY - 2020 VL - 63 IS - 12 SP - 4975 EP - 4985 KW - Conductivity KW - pka KW - Phenolic Schiff KW - Thermodynamic of Ionization DO - 10.21608/ejchem.2020.21228.2266 N2 - This investigation was started by synthesis of four pyridine Schiff bases from the mother compound (Salicyladehyed), whose nomenclatures and structures are seen in the text. The structures of these imines were well confirmed from U.V. and I.R. spectra at melting points. The main objective of this study is the determination of Ka values for these mentioned imines at temperature rang (20-60) Co by conductivity measurement method. This method as found, Simple, precise and accurate. The thermodynamic parameters of ionization for acids were also estimated. This shows that the process of ionization of acidic compounds under study in water Solvent is non spontaneous ( +∆H) and is accompanied by an increase of order ( -∆S). A direct linear plots were obtained between pka for any acid versus the dielectric constant of acid and versus the dietetic constant of ethanol at the five different temperatures. Finally, a suitable interpretation for any one of these thermodynamic parameters are given and discussed UR - https://ejchem.journals.ekb.eg/article_94127.html L1 - https://ejchem.journals.ekb.eg/article_94127_f8dbe1c0ab0734c85bc88f56ed2da18d.pdf ER -