Fichas
Distillation
Fichas del conjunto (14)
- 1Suitable for:Separation of pure liquid from impurities
- 2Apparatus used (9)pear-shaped flask
condensor
Rubber tubing
Stand and clamp
Screw-cap adaptor
Receiver adaptor
Still head
Thermometer
Heat source - 3Where does water enter? Show diagrammaticallyWaterin at lower end of receiver
- 4Step 1.Flask is clamped by its neck and still-head adaptor is connected to flask.
One ground-glass joint of the still-head is fitted to the screw-cap adaptor and the other to the condenser. The joints are greased. - 5Step 2.A second clamp is placed around the receiver adaptor at the point at which it is attached to the condenser. This removes the need to clamp the condenser as it will be sufficiently supported at both ends.
- 6Step 3.Rubber tubing is used to connect inlet of condenser to tap and outlet to sink.
Water enters condenser at the lowest point. - 7Step 4.A conical flask is used to collect the distillate so that the distillation apparatus isn't completely airtight
- 8Step 5.Once the apparatus is set up, the flask is heated and the mixture in the flask will start to boil. The different liquids in the mixture will condense out with lowest boiling point first.
- 9Step 6.Vapour mvoes out of the flask up into other parts of apparatus, leaving behind the less volatile components in the mixture.
- 10Step 7.Once the vapour reaches the cold condenser, it condenses and becomes a liquid which drips into the collecting flask
- 11How to remove acid impurities?Add sodium carbonate and shake the mixture in the separating funnel.
- 12Why do you need to slowly open the tap?Let out CO2 gas formed by reaction of acid with Na2CO3, preventing gas pressure build up.
- 13Final step:Na2CO3 aq. layer removed, organic layer washed with water before running both layers off into two separate flasks.
- 14—
Información
- Descripción
- El usuario ha eliminado su información de asignaturas Fichas sobre Distillation, creado por Usuario eliminado el 09/06/2018.
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- Creado por josephw weetch · 5 jun 2018
- Copiado por josephw weetch · 9 jun 2018
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