what are components of sublimation
centrifuge tube and pipette bulb
why do you put salicyclic acid in ice bath
cooling salicylic acid lowers the solubility
what are the components of a 2M NaOH solution
2 moles of NaOH and 1 L of water
How do you separate 2 liquids?
separatory funnel
what is the point of the separatory funnel?
separate 2 liquids
what does Rf stand for?
Retention Factor = distance of solution/distance of solvent front
What does the rotovap do?
decreases vapor pressure and boiling point
why would you not use a pen for TLC?
It would combine with the solvents
what is the stationary phase?
silica gel
what is the silica gel?
Polar, polar solvents don't travel as far because of more interactions)
what is the boiling point for a 50:50 solution?
100
why is it important to let the apparatus cool?
vapor pressure
what happens if there is too high of a temperature for simple distillation?
thermometer set up wrong, or too high and condensation forming too quickly, need to space out drops.
what is the aq. form of salicylic acid?
sodium salicylate
what happens to salicylic acid if HCl added?
nothing!
what is the purpose of copper gauze?
to increase SA so the vapor can distill more efficiently. this increases the number of distill condense cycles by distilling slowly so the material does not move very far along the column
what is the ideal fractional distillation
straight verticle jump - most steady temp with bigger plateu
what is the process of sublimation
solid is converted into a vapor -> scrape sublimate
what phase has a higher Rf?
mobile phase: non-polar - moving up plate through capillary actions
what does it mean if the unknown has a dot at all 4 spots?
multiple dots mean multiple drugs in one pill - has all the standards
what is the top layer in separatory funnel?
organic layer (less dense) - ethyl acetate and camphor
what is the bottom layer in separatory funnel?
aq. layer (more dense) - sodium salicylate
what will react in an acid-base extraction?
salicylic acid
what kind of funnel do we use for vacuum filtration?
Buchner funnel