Lab - Pennies Report

Lab - Pennies Report - Lab Report: Empirical Formula for...

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Lab Report: Empirical Formula for Zinc Iodide Chelsea Pinkham CHEM 211 – Section 202 September 27, 2010
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Chelsea Pinkham CHEM 211 – Section 202 Purpose: The purpose of this experiment was to determine the empirical formula of Zinc Iodide by measuring the reacting masses of the elements. Procedure: 1. Weigh an empty, dry evaporating dish on the scale. Add about 2 grams of zinc to the evaporating dish, and weigh them both. 2. Weigh an empty, dry beaker on the scale. After tarring the scale, weigh the iodine crystals in the test tube, and record the mass. 3. Take the evaporating dish with the zinc in it to the hood along with the iodine crystals and a test tube. Add the iodine crystals to the evaporating dish, along with 5 milliliters of distilled water. 4. Add a few drops of 6 M acetic acid solution to the evaporating dish and stir with the test tube. Using the test tube, crush the zinc and iodine. Observe and record the changes of the physical and chemical properties. The rest of the experiment can be performed outside the hood, if desired. 5. After the reaction is complete (after about 10 minutes), decant and discard
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Lab - Pennies Report - Lab Report: Empirical Formula for...

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