Reaction of Chlorine with Potassium Iodide Still Images A test tube contains a layer of potassium iodide solution over a denser layer of carbon tetrachloride. Chlorine is bubbled through the potassium iodide layer. The chlorine reacts with the iodide to form iodine. In the aqueous layer the brown triiodide ion is formed by the reaction of iodine with iodide. In the carbon tetrachloride layer, iodine forms a purple solution. The iodine in the aqueous layer reacts further with chlorine to form iodine monochloride. As more chlorine is added, the iodine reacts with the excess chlorine to form iodine trichloride and the solution decolorizes. Some iodine remains in the carbon tetrachloride layer. You can get at large JPEG versions of the images by means of the following links. 0 1 2 3 4 5 6 7 8 9 10 11 12 13 Back to the topic
A test tube contains a layer of potassium iodide solution over a denser layer of carbon tetrachloride. Chlorine is bubbled through the potassium iodide layer. The chlorine reacts with the iodide to form iodine. In the aqueous layer the brown triiodide ion is formed by the reaction of iodine with iodide. In the carbon tetrachloride layer, iodine forms a purple solution. The iodine in the aqueous layer reacts further with chlorine to form iodine monochloride. As more chlorine is added, the iodine reacts with the excess chlorine to form iodine trichloride and the solution decolorizes. Some iodine remains in the carbon tetrachloride layer.
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© 1999 Division of Chemical Education, Inc., American Chemical Society. All rights reserved.
