PPT-Potentiometry

and IonSelective Electrodes 1 Lecture 1 2 Basic Concepts 3 Oxidation Reduction Reactions Redox rxns involve the transfer of electrons from one species of the reactants to another This results in an increase in oxidation number ON of a specific species and a complementary decrease in oxidation number of another species Example. Keri Brophy-Martinez. Designs in Instrumentation. Electrochemistry. Electrochemistry. Basic principle. Electrodes are used to selectively measure particular ions. Instruments utilizing electrodes measure the potential difference (charge) that builds up at an interface when two different . 1. Lecture 2. If metals are the only useful materials for constructing indicator electrodes, then there would be few useful applications of . potentiometry. . In 1901 , Haber Fritz discovered the existence of a change in potential across a glass membrane when its two sides are in solutions of different acidity. The existence of this membrane potential led to the development of a whole new class of indicator electrodes called ion-selective electrodes (ISEs). . 1. Lecture 1. 2. Basic Concepts. 3. Oxidation - Reduction Reactions . (. Redox. . rxns. ) involve the transfer of electrons from one species of the reactants to another. This results in an increase in oxidation number (O.N.) of a specific species and a complementary decrease in oxidation number of another species. Example:. POTENTIOMETRIC ELECTRODES AND POTENTIOMETRY. Ch.13. In this chapter. Understand the concept of the various types of electrodes that can be used for measuring solution potentials.. How to select the proper one for measuring a given . . cells. . are. . the. . cells. . which. . are. . subject. . to. . redox. . reactions. . . There. is a . need. . to. . electron. transfer . to. . redox. . reaction. . to. form . potential.