SCIENCE PHOTO LIBRARY SCIENCE PHOTO LIBRARY
Halogen displacement reactions. Two test tubes showing the results of two experiments to demonstrate the reactivity of chlorine compared to bromine and iodine. The experiments started with aqueous solutions of a bromide (left) and an iodide (right). Chlorine water was added to each test tube, resulting in the more reactive chlorine displacing the bromide and iodide. A non-polar solvent (such as cyclohexane) was then added and the mixtures shaken and allowed to separate, with the organic solvent layer settling above the water layer. The bromine (pale orange, upper left) and the iodine (purple, upper right) are seen dissolved in the organic layer. This set-up also demonstrates the solubility of the halogens in water (lower layer) and cyclohexane (upper layer). Chlorine dissolves in water, but the aqueous solubility of the halogens is generally poor. In cyclohexane, however, they dissolve readily.
Model release not required. Property release not required.