Chlorine displacing iodine

Chlorine displacing iodine

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Credit: ANDREW LAMBERT PHOTOGRAPHY/SCIENCE PHOTO LIBRARY

Caption: Chlorine displacing iodine. Chlorine gas bubbling through an aqueous solution of potassium iodide in a test tube. The reaction is turning brown (from clear) due to the iodine's displacement. 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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Keywords: apparatus, aqueous, bubbling, chemical, chemistry, chlorine, demonstration, displacement, displacing, experiment, gas, glassware, iodine, lab, laboratory, no-one, nobody, potassium iodide, reacting, reaction, reactivity, school science, science education, solution, test tube

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