~~ Chem 207 Lab - Report 5

~~ Chem 207 Lab - Report 5 - PartB1...

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Results and Discussion:   Part B-1 A procedure was designed and carried out to determine the identity of an unknown salt in a  solution. The unknown solution, according to the chemistry lab manual, contained two or more of the  following five salts: NaCl, LiCl, KCl, CaCl 2 , and SrCl 2 . Before the identity of the unknown salt could be  determined, the emission spectra of each of the five salt solutions were found first. In order to do this, small test tubes were half filled with each of the five salt solutions. Cotton  swabs were individually saturated with one unique salt solution and placed into the fire of a lit Bunsen  burner. The flame from the burning salt was analyzed using both a handheld spectrometer and a  computerized spectrophotometer, but for accuracy, only the results from the spectrophotometer were  recorded as follows: Table 1:  Wavelengths emitted by five salt solutions Salt Solution Wavelengths Emitted (nm) NaCl 589.21, 766.00 LiCl 589.21, 687.12 KCl 589.21, 765.84 CaCl 2 554.42, 589.21, 621.81, 671.12 SrCl 2 589.21, 603.98, 671.21, 683.72
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