exper1_zinc_iodide

exper1_zinc_iodide - Danni LaBarbiera(partnered with Esra...

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Danni LaBarbiera (partnered with Esra Kuehlert) Chem 2090 – Kayla Nguyen Experiment 1 – Determination of Chemical Formulae: The reaction of Zinc and Iodine Part 1: Synthesis of Zinc Iodide Measurements: Test Tube 1 39.608 g Test Tube 1 + Zinc 41.661 g Zinc 41.661 g - 39.608 g = 2.053 g Test Tube 1 + Zinc + Iodine 43.721 g Iodine 43.721 g – 41.661 g = 2.060 g Test Tube 2 42.221 g Test Tube 1 with dried Zinc 41.508 g Dried Zinc 41.508 g – 39.608 = 1.900 g Observations: Reaction immediately took place Solution began to visibly bubble (most likely methanol gas) and quickly became warm Solution became a dark yellow/brown color Solution gradually became a clearer yellow color After swirling solution, solution became clear with remaining zinc at bottom of Test Tube 1 Part 2: Isolation of Zinc Iodide Measurements: Test Tube 2 + Zinc Iodide 44.747 g Zinc Iodide 44.747 g – 42.221 g = 2.526 g Reacted Reactants 0.153 + 2.060 = 2.213 % Difference Observations: Zinc Iodide is a white powdered solid Powder slightly resembles chalk Part 3: Electrochemical Decomposition of Zinc Iodide Observations:
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