What are the techniques of Filtration & Crystallisation?
Physical separation techniques
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What are Physical Separation techniques?
Physical Separation techniques are used to separate mixtures
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What cannot Physical Separation techniques do?
Cannot separate the Elements in a Compound
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What is Filtration?
Filtration is used to separate an insoluble solid from a liquid. It is very useful in Chemistry
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Equipment needed for Filtration
Beaker, Filter Tunnel, Filter Paper
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How to: Filtration
We start by pouring our mixture into the filter paper. The liquid passes through the tiny pores in the Filter Paper. The solid Material cannot pass through the pores and so is trapped in the filter Tunnel. So our Liquid & Solid is separated
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What is Crystallisation?
Crystallisation is used to separate a soluble solid from a liquid.
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How to: Crystallisation
We leave the solution for a few days for the liquid to evaporate. This will leave behind crystals of our soluble solid. If we wanted to make Crystallisation happen faster, we can gently heat the solution to evaporate the liquid.
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WARNING: Crystallisation
Be careful that the heating does not affect the chemical we're trying to crystallize because certain chemical break down when you them. So sometimes just Normal Evaporation is the best option.
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Other cards in this set
Card 2
Front
What are Physical Separation techniques?
Back
Physical Separation techniques are used to separate mixtures
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