What is the difference between crystallization and evaporation?

Question

If you want to get a pure solid from a solution, what equipment works the best? Can you get a pure solid out of the evaporator?
Thx

Answer 1

evaporation is the dissipation of a material into a more diffuse state crystallization is the opposite

there is no such animal as a 'pure' solid but you can arrive at a greater level of purity through both processes it's all relative as too which of the materials you are trying to collect - for example you would use the evaporation of liquid to cause the crystallization of a salt

sorry to clarify if you wanted a purer liquid you would use evaporation to remove it from the other material and then as it cooled ( or condensed ) in another location it would be more pure ( distillation of course )

and even though i used a liquid in the example it can also be applied to a solid - many processes use heat to remove one material from another ( as above ) by turning one into a liquid or gas and then condensing it back into a solid form by cooling ( now missing the impurity )

Answer 2

I think crystallization would work better, but this would depend on what substance you were trying to get in a "pure" form and what else was in the mix:

Crystallization relies on substances having different melting points - melt everything, then cool slowly and remove everything that solidifies (crystallizes) at the higher temperatures until you reach the crystallization point for the substance of interest. This could be problematic if two substances had similar melting points.

Evaporation requires putting a solid in solution (which may necessitate the use of an acid or base), then evaporating the liquid portion. Some substances might form in a "pure" form (NaCl) because of their compatible charges, atom sizes, or solubility.

Answer 3

Evaporation is a different process than Crystallization. Evaporation is caused by hot while crystalization is caused by cold.

Answer 4

evaporation turns it into a gas, so no...