Asked in ChemistryRain and FloodingOrganic Chemistry
Rain and Flooding
What substance can be purified by sublimation?
Asked in Organic Chemistry
When can sublimation be used as a means of purifying an organic substance?
Asked in Science, Salt (Sodium Chloride)
Why common salt cannot be purified by sublimation?
What kind of substances can be purified by sublimation?
Sublimation is a technique used by chemists to purify compounds. Typically a solid is placed in a sublimation apparatus and heated under vacuum. Under this reduced pressure the solid volatilizes and condenses as a purified compound on a cooled surface (cold finger), leaving a non-volatile residue of impurities behind. Once heating ceases and the vacuum is removed, the purified compound may be collected from the cooling surface.