lab 2 - and placed under a heating lamp to dry.Measured the...

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Giannina Morales CHM 111 Lab 09-20-10 Title Chromatography Paper Objective Identify two unknown mixtures using chromatography paper with the physical properties of the five know cation and comparing them to the physical properties in the mixture to determine the cation inside them. INSTRUEMENTS AND MATERIALS USED TO PERFORM EXPERIMENT Test Tubes, Chromatography paper, Ruler, Calculator, (5 cation; silver, cobalt, cupper, Iron, mercury) Unknown cation (I and III), Data sheets. Procedure Started by marking a line one centimeter in along the long edge of the chromatography paper. Marked the paper with each of 5 cation; silver, cobalt, cupper, Iron, mercury and also spotted the paper with the two unknowns III and I. A mixture that consisted of 5 cation was made and was placed on the paper. Once spots were dry, the chromatography paper was placed in eluting solvent for about 45 minutes. The chromatography paper was then removed
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Unformatted text preview: and placed under a heating lamp to dry.Measured the distance the solvents moved and recorded it. Observed color of each cation, known and unknown and recorded it. Then the chromatography paper was stained and the colors were observed and recorded. The distance each cation and mixture moved was measured and recorded it. Calculated each Rf by dividing (The distance the solvent moved/ the distance the cation moved).Once all calculations and observations were completed each known cation was compared to the unknown mixture to figure out the corresponding cation. Returned all instruments and materials used, properly in their place. Data attatched Conclusion The two unknown mixtures that were selected to test corresponded to several cations. Unknown III was a mixture of fe + and unknown I was a mixture of Cu 2+ and Ag+...
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lab 2 - and placed under a heating lamp to dry.Measured the...

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