Lab 106 Essay

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Focus Questions: 1) What happens Qualitatively on both the Macroscopic and Atomic levels when zinc, Iodine and Acidified Water are mixed? Does a Reaction Occur? On the Macroscopic Levels, there is no reaction. However, when Zinc and Iodine and Water are mixed together a color is formed in the solution and a release of heat occurs, an exothermic reaction. The color starts out as a reddish brown color, and then, when swirled, becomes a gold yellowish color, and slowly becomes transparent clear at the end of the reaction. As Zinc and Iodine is reacting, the bottom of the test tube would become hot, but slowly, about 5-10 minutes, will begin to cool down to room temperature. On the atomic levels, the atoms of both Zinc and Iodine are reacting causing that exothermic reaction to occur. The atoms would combine together to form ZnI2, and cause a color change because of the interaction between the particles. When the water is evaporated, a white compound of zinc iodide is formed. New bonds are formed with the electron interactions between the Zinc and Iodine. 2) If a reaction does take place, are the physical and chemical properties of the substances, isolated during and after the mixing, the same as, or different from those of Iodine and Zinc? Explain using your reaction as an example. The physical changes of the zinc is grey, iodine is blackish blue, and zinc iodide is white. The Zinc Granules are while silver pieces of shredded metal while iodine crystals were small silver balls. However, the gray solid that we had obtained was a duller dark gray granular zinc. The colored solution was orangeish brown color which showed that the colored solutions contained the zinc-ion, iodine, iodide, and triiodide ion in water. The white solid was white and pebble like similar to the original solid zinc iodine. The reaction between the white solids of zinc metal and iodine starts

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