Redox titration is a quantitative analytical method used to determine the concentration of an unknown solution through oxidation-reduction reactions. In this process, a solution with a known concentration, called the titrant, is gradually added to the unknown solution until the reaction reaches its endpoint, which is often indicated by a color change. During a redox titration, electrons are transferred between the reactants, leading to oxidation of one species and reduction of another. Common indicators, such as dichromate or permanganate, can be used to signal the endpoint. This technique is widely applied in various fields, including chemistry and environmental science.