A student is analysing a synthetic dye mixture using thin-layer chromatography (TLC). The stationary phase consists of a silica-gel-coated plate, and the mobile phase is ethyl acetate.
Based on the chromatogram obtained, which of the following correctly identifies the roles of the two phases and the retention factor (RfR_fRf) of the dye spot?
Silica gel is the stationary phase, ethyl acetate is the mobile phase, and Rf=0.36R_f = 0.36Rf=0.36
Silica gel is the mobile phase, ethyl acetate is the stationary phase, and Rf=0.36R_f = 0.36Rf=0.36
Silica gel is the stationary phase, ethyl acetate is the mobile phase, and Rf=2.78R_f = 2.78Rf=2.78
Silica gel is the mobile phase, ethyl acetate is the stationary phase, and Rf=2.78R_f = 2.78Rf=2.78