1. You have just completed a TLC plate to try and find 1 unknown substance out of 6 substances.

a) Explain how you identified each spot and how the Rf values relate to the relative polarities of the compounds.

b) Do you expect the different compounds that might be in your unknown to interact differently with the silica plate? With the eluent? Explain your reasoning.

c) What is the best way to mark your TLC plate? Why? Explain your reasoning.

d) Is it possible to compare the results of two different TLC plates without a common spot? Explain your reasoning.

e) Can TLC be used to identify a compound? Explain how.

f) For what conditions would you conduct a TLC experiment? Why would you use it? Briefly explain.

G) How could you use TLCs to determine that a reaction has ended?

H) How can the TLC of a pure substance differ from that of a crude (impure) substance?