Chlorine displacing iodine. Chlorine gas bubbling through an aqueous solution of potassium iodide in a test tube. The reaction is turning brown due to

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Chlorine displacing iodine. Chlorine gas bubbling through an aqueous solution of potassium iodide in a test tube. The reaction is turning brown due to the iodine's displacement. A clear solution of potassium iodide is seen at left in a glass bottle. This reaction is known as a displacement or substitution. The chlorine is said to be more reactive than iodine, so it replaces the iodine in the potassium salt, causing a brown aqueous iodine solution to form. The equation for this reactions is: Cl2 + 2KI ---> I2

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Photo credit: © ANDREW LAMBERT PHOTOGRAPHY/SCIENCE PHOTO LIBRARY / Alamy / Afripics
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Keywords: apparatus, aqueous, bubbles, bubbling, chemical, chemicals, chemistry, chlorine, demo, demonstration, displacement, displacing, experiment, gas, glassware, iodide, iodine, lesson, potassium, practical, reaction, reactivity, school, solution, test, tube