Question

Extraction of Caffeine from Vivarin Tablets

Tablet Additives The Lab Manual and PowerPoint list some additives in the Vivarin tablets. List these compounds and state where they will be found at various points in the isolation: as a filterable or decantable solid; in the polar aqueous phase; or in the non-polar organic dichloromethane phase.

–polyethylene glycol and polysorbate 80 (water-soluble)

–titanium dioxide and silicon dioxide (water-insoluble)

–D&C yellow #10 and yellow #6 aluminum lake dyes (water-insoluble)

–carnauba wax (water-insoluble)

–dextrose (water-soluble)

Answer 1

polyethylene glycol and polysorbate 80 & dextrose: in polar aqueous phase

titanium dioxide and silicon dioxide & carnauba wax: as a filterable or decantable solid

D&C yellow #10 and yellow #6 aluminum lake dyes : in the non-polar organic dichloromethane phase

Those compounds soluble in water will definitely soluble in polar aqueous phase

titanium dioxide and silicon dioxide & carnauba wax are water insoluble. So they can be either soluble in organic phase or filterable or decantable solid. But  titanium dioxide and silicon dioxide & carnauba wax are insoluble in organic phase

D&C yellow #10 and yellow #6 aluminum lake dyes are organic dyes which are definitely soluble in organic phase