This document discusses electrochemistry and provides definitions and examples of key concepts. It defines oxidation as the loss of electrons and reduction as the gain of electrons. An electrochemical reaction is one where a chemical reaction produces an electric current or where an electric current causes a chemical reaction. There are two types of electrochemical cells - galvanic cells where a chemical reaction produces a current, and electrolytic cells which use electricity to drive a non-spontaneous reaction. The document also discusses standard electrode potentials and how they are used to calculate cell emf and predict reaction spontaneity. Industrial applications of electrochemical cells mentioned include electrolysis, chloralkali production, and metal extraction from ores.