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Distillation

Gelöschter Nutzer Der Nutzer hat seine Fachbereichs-Information gelöscht. Englisch 14 Karten

Karten in diesem Stapel (14)

  1. 1Suitable for:Separation of pure liquid from impurities
  2. 2Apparatus used (9)pear-shaped flask
    condensor
    Rubber tubing
    Stand and clamp
    Screw-cap adaptor
    Receiver adaptor
    Still head
    Thermometer
    Heat source
  3. 3Where does water enter? Show diagrammaticallyWaterin at lower end of receiver
  4. 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.
  5. 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.
  6. 6Step 3.Rubber tubing is used to connect inlet of condenser to tap and outlet to sink.
    Water enters condenser at the lowest point.
  7. 7Step 4.A conical flask is used to collect the distillate so that the distillation apparatus isn't completely airtight
  8. 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.
  9. 9Step 6.Vapour mvoes out of the flask up into other parts of apparatus, leaving behind the less volatile components in the mixture.
  10. 10Step 7.Once the vapour reaches the cold condenser, it condenses and becomes a liquid which drips into the collecting flask
  11. 11How to remove acid impurities?Add sodium carbonate and shake the mixture in the separating funnel.
  12. 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.
  13. 13Final step:Na2CO3 aq. layer removed, organic layer washed with water before running both layers off into two separate flasks.
  14. 14—

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Beschreibung
Der Nutzer hat seine Fachbereichs-Information gelöscht. Karteikarten am Distillation, erstellt von Gelöschter Nutzer am 09/06/2018.
Erstellt von
Gelöschter Nutzer · Jun 2018
Aktualisiert
9 Jun 2018
Aufrufe
16
Verlauf
  • Erstellt von josephw weetch · 5 Jun 2018
  • Kopiert von josephw weetch · 9 Jun 2018
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