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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Crédit: | Science Photo Library / Andrew Lambert Photography |
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