The following questions relate to the column chromatography experiment.a. Why does the fluorene elute first from the column?b. Why was the solvent changed in the middle of the column procedure?

Preparing a Thin Layer Chromatography experiment there are some common mistakes. Explain what happens in this situation: The solvent is above the line where the sample spots are

In the second paragraph you should define and describe the process of gas chromatography. In this paragraph answer the following questions: a) Why might it be necessary to dilute the sample? Approximately how much sample is used? b) Describe good injection technique. What sort of syringe is used in gas chromatography? c) What property of compounds will make the retention time longer or shorter? Use as an example ethyl acetate, propyl acetate, and butyl acetate, since these compounds are the ones we are studying in this experiment. d) What are a few different types of detectors and how do they work?

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