What is the purpose of the piece of filter paper inside the 400 mL beaker? What would happen if you used 100% ethanol, instead of the 1:1 methylene chloride:ethanol mixture, to extract the active ingredients from the commercial unknowns? (Consider the relative polarity of the compounds involved) What is a chromophore? How (thinking on the techniques learned in this lab) might one tell if some unknown powder is or is not, for example, cocaine?
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