Unformatted text preview: ch compound is in which lane and give the Rf values. 3 What is the purpose of the moistened folded piece of filter paper inside the chamber? If the
paper were not there, would the Rf values be too high or too low?
The purpose of the moistened folded piece of filter paper is to help saturate the atmosphere with
solvent vapor by wicking the solvent into the upper region of the chamber. If the paper were not
there, the Rf values would be too high because the solvent front distance would be lower.
Fill in the TLC plates for you unknown mixtures: 4
Unknown Sample Number_________
hexane/ ethyl acetate
What compounds were in your unknown mixture? (include name and structure)
Benzophenone and P-toluic acid were in our unknown mixture. Rank the compounds in your unknown sample in order of polarity (least to greatest)
Benzophenone was the least polar while P-toluic acid was the most polar Explain the solvent system you chose and how it affected more movement of some molecules
compared to others.
We used a 5:1 ratio of hexane/ ethyl acetate solvent system. Consider two o...
View Full Document
- Winter '08
- pH, Solvent, Chemical polarity, Benzophenone, TLC Analysis of Unknowns