CK-2_Chromatography_of_Food_Dyes_RPT - D. Why is it...

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Lab Report Assistant: This document is not meant to be a substitute for a formal laboratory report. It is simply a summary of the experiment’s questions and data tables which should be addressed in a formal lab report. The intent is to facilitate student’s writing of lab reports by providing this information in an .rtf format which can be copied and pasted into an electronic document. Chromatography of Food Dyes Color Blue1 Blue2 Red3 Red40 Yellow 5 Yellow6 Solvent Distance (mm) Rf Substance Kool-Aid ® : Grape Kool-Aid ® : Strawberry Solvent Distance (mm) Distance (mm) Rf Substance Store Red Store Yellow Store Green Store Blue Solvent Distance (mm) Rf Substance Green M&M Yellow Blue Red Solvent Distance (mm) Rf Questions A. Why can't a pen be used to draw the baseline on the chromatography paper? B. Why is it important to stop the chromatograph before the solvent reaches the top of the paper? C. Why is it important to keep the dye spots above the solvent level?
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Unformatted text preview: D. Why is it important to mark the solvent level on the chromatography paper when you remove it from the petri dish? Extra credit and/or extra fun possibilities: Experiment with different solvents such as pure water, rubbing alcohol, or a mixture of alcohol and water. Do not use flammable solvents to experiment! There are often interesting dyes making up the colors of marker pens (especially black). If you want to experiment with marking pens remember not to use permanent ink markers for this experiment. An extra sheet of chromatography paper is included in your LabPaq in the Special Papers Bag. However, you can usually substitute white coffee filters and some brands of paper towels for chromatography paper if you want to conduct more than one extra trial. 2...
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This note was uploaded on 02/13/2012 for the course CHEMISTRY chem 104 taught by Professor Lewis during the Spring '11 term at Jefferson Community and Technical College.

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CK-2_Chromatography_of_Food_Dyes_RPT - D. Why is it...

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