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11 Nov 2019
2 EXPERIMENT 2a Pre-Lab Questions of the two main pigments, lycopene and R-carotene, are shown in the Background section. These pigments are examples of alkenes what functional group present in these molecules allows for this classification? b. Would these compounds dissolve in hexane, a nonpolar solvent, or water, a polar solvent? Explain your answer. are asked to mark the chromatography paper with a pencil and not with a flair or ink pen. Why does this make a difference? 3. Why is bromine a good reagent to use in this experiment? 4. What is the "Re value"? How is it determined? 5. This experiment uses two systems of chromatography; name the two systems. 32
2 EXPERIMENT 2a Pre-Lab Questions of the two main pigments, lycopene and R-carotene, are shown in the Background section. These pigments are examples of alkenes what functional group present in these molecules allows for this classification? b. Would these compounds dissolve in hexane, a nonpolar solvent, or water, a polar solvent? Explain your answer. are asked to mark the chromatography paper with a pencil and not with a flair or ink pen. Why does this make a difference? 3. Why is bromine a good reagent to use in this experiment? 4. What is the "Re value"? How is it determined? 5. This experiment uses two systems of chromatography; name the two systems. 32
Sixta KovacekLv2
5 Jan 2019