Pharmacy Study Material

Free pharmacy material Redox Titration INTRODUCTION This titrimetric method is mainly based upon the change of the oxidation number or electrons transfer between the reactants, that is, these reactions are mainly based upon the oxidation-reduction reactions. In oxidation-reduction titration method, a reducing substance is titrated with standard solution of an oxidizing agent (e.g., ceric ammonium sulphate) or an oxidizing substance is titrated with the standard solution of the reducing agent (e.g., titanous chloride). PRINCIPLE The principle involved in the oxidation-reduction titrations is that the oxidation process involves the loss of electrons whereas the reduction process involves the gain of electrons. Oxidant + ne ↔ Reductant The redox titration is mainly based upon the oxidation of the analyte by the oxidizing agent and the oxidation and reduction of the reaction is determined by the indicators or by potentiometric. The permanganate ion undergoes the fo...