Separation Techniques Flashcards
What is Filtration?
Filtration Separates Insoluble Solids from Liquids
What is the first way to Separate Soluble Solids from Solutions?
Evaporation - Pour the Solution into an Evaporating Dish.
Slowly heat the Solution. The Solvent will evaporate and the Solution will get more concentrated. Eventually, crystals will start to form.
Keep heating the evaporating dish until all you have left are dry crystals.
What is the second way to separate Soluble Solids from Solutions?
Crystallisation - Pour the solution into an evaporating dish and gently heat the solution. Some of the solvent will evaporate and the solution will get more concentrated.
Once some of the solvent has evaporated, or when you see crystals start to form (the point of crystallisation), remove the dish from the heat and leave the solution to cool.
The salt should start to form crystals as it becomes insoluble in the cold, highly concentrated solution.
Filter the crystals out of the solution, and leave them in a warm place to dry. You could also use a drying oven or a desiccator.
What is a use for Filtration and Crystallisation?
Filtration and Crystallisation can be used to separate Rock Salt
