The Analysis Of Unknown Compounds

948 WordsNov 17, 20154 Pages
In our consumer-driven society the analysis of unknown compounds can prove to be dire due to the fact that some compounds are determining the life or death of different drug and food buyers. In this lab, confirmation and elimination test were conducted to figure out the identity of the cation and anion of an unknown ionic compound. The results of each test provided “clues” to the identity through the use of logic trees constructed in parts 1 and 2 of the lab. Materials and methods PART ONE: Elimination tests were done on each of the five cations, "K" ^"+" , "Z" "n" ^"2+" , 〖"Cu" 〗^"2+" , and 〖"Co" 〗^"2+" to distinguish them from one another. First, five centrifuge tubes were obtained and labeled, one for each cation solution. After the centrifuge tubes were labeled, ten drops of each cation solution were added to their appropriate tube. In the first elimination test, Metal Hydroxide Test, 6 M NaOH was added by drop to each centrifuge tube until a precipitate was formed in the solution. The cation solutions that formed a precipitate, an extra ten drops of 6 M NaOH was added to test for amphoteric species. In the second elimination test, Ammonium Hydroxide Test, five centrifuge tubes were labeled and ten drops of each cation solution were added to their specific tube. 15 M 〖"NH" 〗_"4" "OH" was added to each tube until a precipitate formed or the color of the cation solution changed. In the confirmation flame test of the five cations, again five tubes were labeled and
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