By letting smaller pieces or liquids pass through but trap insoluble substances
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State what is meant by insoluble?
A substance that cannot be dissolved in a certain liquid
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What is meant by filtration?
Using a filter to separate insoluble substances from a liquid
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What is a solution?
A mixture of solutes in the liquid called the solvent
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State what is meant by crystallisation?
Separating a solute from a solution by evaporating the solvent
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What forms in crystallisation?
Crystals form slowly
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What is meant by saturated Solution?
Contains the maximum solute that can be dissolved in that amount of solvent at that temperature
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How do you filter a solution in a laboratory?
A filter funnel is lined with a filter paper that has fine lines in it.Bits of insoluble substance cannot fit through the hole so leaves a residue in the filter paper.
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Why is a Bunsen burner used?
A bunsen burner is used to evaporate the filtrate.
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Why must care be taken to not overheat the solution?
Because once the solution is saturated hot crystals may spit out heating can also make the crystals change chemically
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What is a hazard?
Something that could cause harm
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What is meant by risk assessment?
Identifying the risk in doing the experiment and ways of reducing harms from those hazards
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What could you do to stop the risk of spitting?
Wearing a eye protection
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What about the Bunsen burner?
It could be removed before the solution is dry and then steam could be used to evaporate the basin gently.
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Other cards in this set
Card 2
Front
How do they separate mixtures?
Back
By letting smaller pieces or liquids pass through but trap insoluble substances
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