secretformula - University of Florida Chemistry Outreach...

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University of Florida Chemistry Outreach Program Secret Formulas Estimated Time: 30 mins. + 10 mins. clean-up Topics: Rate of flow ( R f ), Chromatography, SC.H.1.3 Introduction: Color-coated candies are very popular. Candy companies use scientists to help them formulate the colors for candy coating. The science of color-mixing uses the combinations of multiple dyes. The dyes can be separated in a process called chromatography which involves using porous paper and capillary action to divide out the mixture. Since the fastest molecule will travel the greatest, the distance the molecules travel can be used to determine the rate of flow, R f . R f = Distance the solute traveled Distance the solvent traveled Some dyes will be more attracted to the solution (in this lab it is alcohol) and will easily move through the paper, but molecules less attracted to the solvent will stick and not move as far on the paper. Objective: Students will practice using the rate of flow equation to determine and compare the component parts of different candies that have the same color. The goal is to discover if different candies that have the same color use the same type of dyes. Also, students should investigate if different candy colors
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This note was uploaded on 09/18/2011 for the course CHM 3218 taught by Professor Stewart during the Spring '08 term at University of Florida.

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secretformula - University of Florida Chemistry Outreach...

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