Sodium nitrate decomposes when heated. Which method is the best
way to obtain crystals of sodium nitrate from aqueous sodium
nitrate?
A - Sublimation
B - Distillation
C - Evaporation to dryness
D - Crystalization
My guess is either A or D cuz the other 2 options require heat.
However, take into account that you still needa heat the
liquid sodium nitrate until saturated should you want to perform
crystalization and you'll consider about whether or not to put D as
the answer. Because, as the question says, sodium nitrate
decomposes when heated.
Sublimation - From solid to gaseous state.
So this is out.
Left with option D.
Hope to hear from other's opinion.