This electrochemistry unit provides a clear and accessible introduction to the core ideas required for IGCSE Chemistry, including oxidation and reduction, ionic movement, and the operation of electrolytic and galvanic cells. It explains how electrical energy can drive chemical reactions (electrolysis), how to write half-equations for electrode processes, and how to predict the products formed during the electrolysis of both molten and aqueous ionic compounds. The slides also cover essential applications such as electroplating, metal extraction, and the purification of copper. This section is designed to give students a solid conceptual understanding supported by worked examples, annotated diagrams, and step-by-step explanations.