PAG 5 Synthesis of an organic liquid Flashcards
why do we heat under reflux?
to prevent any reacting substances from escaping
why do we heat under distillation?
to purify a product
outline how to obtain a pure sample
remove mixture from round bottom flask
place in separating funnel
add sodium carbonate to remove impurities
stopper funnel and invert multiple times
allow for two separate layers to settle
remove organic layer (refer to densities in Q)
dry organic layer using drying agent
redistill at given temp
examples of drying agent
CaCl2
CaSO4
MgSO4
how can TLC be used to monitor the course of a reaction?
take samples of the reacting mixture at regular intervals and run the samples on TLC plate alongside cyclohexane
how can the identity of an organic product be identified?
recrystallise solution and determine melting point of the crystals
compare melting point to known values in a database
diagram for reflux
diagram for distillation
