P2 S2 Preparatory Work.docx - Chemical Thinking P2 S2...

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Chemical ThinkingP2 S2Preparatory Work v1.4 | 1Project 2 Session2Preparatory WorkYour TA’s name: Andrea HamiltonYour name: Alan TranLab section: 003CYour email: [email protected]Write an initial experimental plan to identify the FD&C food dye(s) present in your assigned commercialcandy sample. There are several points you should consider in your experimental design. First, thespectrophotometers in lab produce absorption spectra (Avs. λplots) for a substance in solution in onestraightforward reading. Second, such absorption spectra (Avs. λplots) typically have a wavelength ofmaximal absorption (λmax), which is considered a differentiating characteristic for the substance. Thismeans λmaxcan, in theory, be used to identify substances. In lab, you will have access to stock solutions ofall seven FD&C food dyes. Your task is to devise an experimental strategy and write out a procedure, inoutline form, that identifies which FD&C food dye(s) are responsible for imparting color to the candyyour group has been assigned to. 1.Measure out 0.5mL of Methanol (methyl alcohol) into a 1-dram testing vial.2.Add 2 drops of Red #3 (Erythrosine) into the same 1-dram testing vial.

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