This advanced chemistry course delves into electrochemistry and explains electrolysis, electrode potential, cells and batteries. We begin by discussing redox reactions found in two types: oxidation and reduction reactions. We then describe the chemical reactions influenced by a passing current (called ‘electrolysis’), the electrolysis cell with its components and reactions at the anode and cathode. We then explain how to use quantitative electrolysis to determine the amount of metal deposited when passing a specific current. The course shows you how to calculate the Avogadro constant using an electrolytic method.

The course then moves on to electrode potential and lays out the method of measuring the electrode potential of a half-cell using a reference electrode (for example, a standard hydrogen electrode with a known potential). We also investigate galvanic cells (voltaic cells), which use spontaneous redox reactions to produce electricity, and their constituent parts. We also compare electrolytic and galvanic cells. The course then examines standard cell potential, cell voltage (standard cell potential) and how temperature, pressure or concentration affect the electrode potential.

We then cover the Nernst equation, which relates the electrode potential to the temperature and concentration of an electrode. The course investigates primary batteries (non-chargeable disposable batteries), including cylindrical and button primary batteries along with their components, and some secondary batteries (rechargeable) such as lead and Lithium-ion batteries, along with their usage in cars and electronics. We also discuss hydrogen-oxygen fuel cells that power automobiles by generating energy through a redox reaction. Finally, we outline the use of molten electrolytes and aqueous electrolytes. This advanced chemistry course suits chemistry students and aspiring electrical engineers. Sign up to learn more about batteries and electrochemistry.