Atomic Emission Spectra

Atomic Emission Spectra - Experimental Results: NaCl:...

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Nhi Vu General Chemistry Agnes Rafoulko Atomic Emission Spectra Introduction: In this experiment, we will be observing and recording the colors emitted by known elements when placed over a Bunsen burner flame. Using these recordings, we will then determine the identity of an unknown sample. Chemical Responsibility: Some of the chemicals we will be interacting with today are irritant, toxic by ingestion or corrosive. It is crucial that we wear our safety goggles and gloves at all times. Report Sheet: Materials : Sodium chloride, potassium chloride, strontium chloride, barium chloride, calcium chloride, copper (II) chloride, and hydrochloric acid Procedures : 1. Using a Nichrome wire, dip the looped end into 6 HCl and place over Bunsen burner flame to clean and decontaminate 2. Dip the looped end into known solution, making sure you decontaminate before to prevent any mixing. Record color of flame. 3. Repeat step 2 for each solution
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Unformatted text preview: Experimental Results: NaCl: orange CaCl 2 : orange/yellow KCl: pink/purple SrCl 2 : red BaCl 2 : yellow CuClCl 2 : green UNKNOWN CODE LETTER: e IDENTIFICATION OF UNKNOWN: SrCl 2 Discussion of Results: The color determinations of the flame were unclear for certain solutions, such as CaCl 2 and KCl. Other than that, the flames produced a distinct color that displayed the identity of the solution. The unknown code letter of our solution was e, and when placed over the Bunsen burner flame, the color red was emitted. Accordingly, it can be concluded that the solutions identity is SrCl 2 . Conclusion: Conducting this experiment allowed us to determine the colors certain solutions emit when heated under a Bunsen flame. Using these results, we were able to compare and determine the identity of an unknown. My unknown, e, emitted a red flame, which corresponds to the solution of strontium chloride....
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