Determining the Chemical Formula of Zinc Iodide -...

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Determining the Chemical Formula of Zinc IodideBy:Josephine HongLab Partners: Stephanie HsuLab Instructor: Ningmu ZouDue: September 21, 2012Submitted: September 21, 2012
Introduction:A reaction of two elements can produce compounds with integer atom ratios. The empirical formula, or the simplest chemical formula, can be obtained using the masses of each reactant that form the final compound.In this lab, granular zinc metal and elemental iodine were dissolved in a slightly acidic acid to combine and form zinc iodide. After measuring the masses of iodine and zinc, the empirical formula was determined through the use of mole ratio. Finally, we confirmed the Law of Conservation of Mass by observing that the mass of reactants was equal to the mass of products.Data:Mass of Test Tube: 17.332 gTable 1: Mass of ReactantsMass of Test Tube w/ Zinc19.341 gMass of Zinc2.009 gMass of Test Tube w/ Zinc & Iodine21.305 gMass of Iodine1.964 gTable 2: Mass of Excess Reagent Mass of Test Tube w/ Dry Zinc18.825 gMass of Dry Zinc1.493 gMass of Zinc Consumed: 0.516 gTable 3: Mass of Product

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