What is azotropic distillation?
Sometime when you try to purify a liquid through distillation, you will reach a point where both liquids boil off at the same rate. Your distilate will always have the same ratio of your liquids no mater what you do. These mixtures are called azotropic mixtures. This can be usefull in some cases if you want a product from a reaction to be distilled with its solvent. This would be an azotropic distillation.