What are the surface functional groups on the stationary phasein normal phase LC and reverse phase LC. Write out the eluotropicseries for both normal phase LC and reverse phase LC using thecommon solvents we discussed in class (acetonitrile, MeOH,diethylether, H2O, pentane, toluene).  Whyacetonitrile is a stronger eluting solvent than toluene in normalphase LC?