RP10: Preparation of organic solids and liquids Flashcards
1
Q
Describe the purification process of an organic solid
A
Dissolve in minimum amount of hot solvent to dissolve insoluble impurities. Then filter the solution under reduced pressure hot to remove insoluble impurities. Cool the filtrate in ice to form crystals.
2
Q
Why is a minimum amount of solvent used in the purification process of making the solid?
A
To enable crystals to form
To obtain a saturated solution
3
Q
Why is the solution filtered hot?
A
To remove insoluble impurities
4
Q
Why is H2SO4/ H3PO4 used in the making of aspirin?
A
As a catalyst
5
Q
What is a safety precaution for using the separating funnel?
A
Open and close tap periodically to prevent build up of pressure
