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Simplest formula of copper iodide: a stoichiometry experiment.
J Chem Educ 1983 Feb; 60(2):147
An experiment suitable for use in teaching principles of stoichiometry and chemical laboratory techniques is described. It is intended for high school or college courses in general chemistry. The experiment involves dissolving a known mass of copper metal and quantitatively precipitating the copper as copper iodide, CuI. A student using the experiment is given as background information the atomic masses of copper and iodine and is expected to determine the empirical formula of copper iodide, that is, to decide from his or her measurement of its I:Cu atom ratio whether copper iodide is CuI or CuI2. In use by a group of typical students at the University of Nevada at Reno, the experiment gave an average result for the I:Cu ratio equal to 1.02 with a standard deviation of 0.16.
Laboratory techniques; Chemical reactions; Copper compounds; Metallic compounds; Training
D. J. MacDonald, U.S. Bureau of Mines, Reno Research Center, Reno, NV 89512
OP; Journal Article
Issue of Publication
Journal of Chemical Education
Page last reviewed: September 2, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division