What is a half equation?

A half equation is a representation of a single half of a redox reaction, focusing on either the oxidation or reduction process. It shows the transfer of electrons, indicating the species that loses electrons (oxidation) and the species that gains electrons (reduction). Half equations are often used in electrochemistry to balance redox reactions and understand the electron flow in reactions involving oxidation states. They typically include the reactants, products, and the number of electrons involved.