Halogen displacement reaction.

Halogen displacement reaction.

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Credit: MARTYN F. CHILLMAID/SCIENCE PHOTO LIBRARY

Caption: Displacement reaction is a chemical reaction in which a more reactive element displaces a less reactive element from its compound. The test tubes contain (L) bromine and (R) iodine that have been displaced from potassium bromide and potassium iodide solutions by a few drops of chlorine water, a halogen. A comparative darkening of the solution is a simple indication that the displacement has occurred. Chlorine is more reactive than bromine and iodine and is able to displace them. The order of reactivity of these Group 7 halogen elements from highest to lowest is chlorine, bromine and iodine.

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Keywords: bromine, chemical, chemistry, chlorine, diatomic molecules, displacement, experiment, group 7, halogen, iodine, potassium bromide, potassium iodide, reacting, reaction, reactive, reactivity, science, solution, test tube, water

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