Separation Techniques
- Created by: GreenGooSnake
- Created on: 29-05-19 20:51
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- Atoms - Lesson 3 - Separation Techniques
- DISTILLATION
- SIMPLE DISTILLATION - separating a LIQUID from a SOLUTION
- Solution is HEATED. EVAPORATION happens.
- VAPOUR is COOLED, CONDENSES and is COLLECTED.
- Rest of SOLUTION is left behind.
- VAPOUR is COOLED, CONDENSES and is COLLECTED.
- PROBLEM - Only use it with things that have VERY DIFFERENT boiling points
- Solution is HEATED. EVAPORATION happens.
- SIMPLE DISTILLATION - separating a LIQUID from a SOLUTION
- FRACTIONAL DISTILLATION
- Used for - separating a MIXTURE OF LIQUIDS.
- Put MIXTURE in flask and stick a FRACTIONATING COLUMN on top then heat.
- DIFFERENT LIQUIDS = DIFFERENT BOILING POINTS - evaporate at DIFFERENT TEMPERATURES.
- LOWEST BOILING POINT liquid evaporates first.
- When first liquid has been collected you RAISE THE TEMPERATURE until the NEXT ONE reaches the top
- LOWEST BOILING POINT liquid evaporates first.
- DIFFERENT LIQUIDS = DIFFERENT BOILING POINTS - evaporate at DIFFERENT TEMPERATURES.
- Put MIXTURE in flask and stick a FRACTIONATING COLUMN on top then heat.
- Used for - separating a MIXTURE OF LIQUIDS.
- Filtration
- Filtration is a method for separating an insoluble solid from a liquid. When a mixture of sand and water is filtered:the sand stays behind in the filter paper (it becomes the residue)the water passes through the filter paper (it becomes the filtrate)
- CRYSTALLISATION
- 1. Pour in EVAPORATING DISH and HEAT. SOLVENT will evaporate and solution more CONCENTRATED.
- Leave to COOL when crystals start to form.
- FILTER the crystals out of the solution
- Leave to COOL when crystals start to form.
- BOTH can be used to separate ROCK SALT
- Filtration
- Filtration is a method for separating an insoluble solid from a liquid. When a mixture of sand and water is filtered:the sand stays behind in the filter paper (it becomes the residue)the water passes through the filter paper (it becomes the filtrate)
- ROCK SALT - A MIXTURE of SALT and SAND.
- GRIND mixture to make sure crystals are small and dissolve easily.
- Put in water and stir. SALT DISSOLVES but SAND WON'T.
- FILTER mixture. GRAINS OF SAND won't fit through tiny filter paper holes. SALT passes THROUGH.
- EVAPORATE water from salt so it forms DRY CRYSTALS.
- FILTER mixture. GRAINS OF SAND won't fit through tiny filter paper holes. SALT passes THROUGH.
- Put in water and stir. SALT DISSOLVES but SAND WON'T.
- Filtration
- 1. Pour in EVAPORATING DISH and HEAT. SOLVENT will evaporate and solution more CONCENTRATED.
- DISTILLATION
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