Iodine clock reaction

The iodine clock reaction is a chemical experiment demonstrating a rapid change in color caused by a chain of chemical reactions. When the reactants are mixed, a series of reactions produce iodine, which initially remains hidden in a colorless solution. After a specific time, a sudden reaction causes the iodine to form, turning the solution blue-black almost instantly. The time before this color change depends on the concentration of reactants, making it a visually striking way to study reaction rates and chemical kinetics.