Exp#3Stoichiometry - Chem 11 Pre-laboratory Assignment...

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Chem 11 Exp. #3 Stoichiometry Laboratory Pre-laboratory Assignment 1. Review in Zumdahl, Chapter 3 Stoichiometry , Sections 3.5-3.8, pp. 60-71. 2. Define empirical formula and percentage composition. Introduction In this laboratory experiment, a copper chloride compound will be studied. The percentage composition and the empirical formula of the copper chloride compound will be determined. A solution with a known quantity of copper chloride will be given to you. The reactivity of zinc in an aqueous copper chloride solution will be used as a tool in studying the copper chloride compound. When metallic zinc is added to an aqueous copper chloride solution, zinc chloride is produced and the aqueous copper ions are converted into solid metallic copper (see schematic equation below). The solid metallic copper can then be collected and quantified. Using the numerical values from the concentration of the original aqueous copper chloride solution and the quantity of solid metallic copper produced the percentage composition (grams of copper / grams of
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