Consider the following silica gel TLC plate of compounds A, B, and C that was ru

ID: 1069989 • Letter: C

Question

Consider the following silica gel TLC plate of compounds A, B, and C that was run in a pure hexanes solution (non-polar):

1.) What is the stationary phase in this chromatographic system?

2.) What is the mobile phase in this chromatographic system?

3.) Which of the compounds, A, B, or C is the most polar?

4.) What would you expect to happen to the R f values if you used a more polar

solvent such as acetone (CH 3 C(O)CH 3 ) instead of hexanes (C 6 H 14 ) as the eluting

solvent?

solvent front --o-o-o origin A BC

(1) Silica gel

(2) hexane

(3) A . Because it is readily attracted by polar silica gel.

(4) Rf values would decrease for polar solute and increase for non polar solute.