Chemistry 1212k Lab

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I. Introduction The main objective for Chemistry 1212K laboratory is to familiarize students with basic yet critical techniques needed to further pursue a career in the science field. The goal for Chemistry 1212K lab was to determine the unknown formula of a synthesized cobalt-ammonia-halide product through a combination of experiments. The only way to calculate the particular chemical relationship was through finding the percent Cobalt, percent ammonia, and percent halide (either Cl- or Br-) and comparing the experimental results to the theoretical values located in the manual. The formula is composed of a metal coordination compound, consisting of a ligand that is covalently bonded to a metal ion (Kauffman). In this case, the central metal is cobalt 3+ and the attached molecule is ammonia. The amount of atoms that are given to the cobalt 3+ (otherwise known as the coordination number) ranges from…show more content…
Additionally, a halide ion of either chlorine or bromine is bonded to the compound through ionic bonds. In summation, the unrevealed formula will consist of ammonia (NH3), the metallic ion of cobalt (Co 3+), and a specific halide (Cl- or Br-). An important component of each compound is coloration. Each synthesis procedure yields a product that has unique pigmentation. For instance, in our case of synthesis procedure IV that included the halide ion of bromide, the concocted substance was a violet tone. In other synthesis procedures that included chlorine instead, the compound color was actually orange. The detection of pigmentation along with the execution of a semester-long series of experiments helped to not only further encapsulate students into the complex world of chemistry, but also to determine the unknown formula of a metal
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