Distillation

Descrição

FlashCards sobre Distillation, criado por josephw weetch em 05-06-2018.
josephw weetch
FlashCards por josephw weetch, atualizado more than 1 year ago
josephw weetch
Criado por josephw weetch mais de 6 anos atrás
2
0

Resumo de Recurso

Questão Responda
Suitable for: Separation of pure liquid from impurities
Apparatus used (9) pear-shaped flask condensor Rubber tubing Stand and clamp Screw-cap adaptor Receiver adaptor Still head Thermometer Heat source
Where does water enter? Show diagrammatically Waterin at lower end of receiver
Step 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.
Step 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.
Step 3. Rubber tubing is used to connect inlet of condenser to tap and outlet to sink. Water enters condenser at the lowest point.
Step 4. A conical flask is used to collect the distillate so that the distillation apparatus isn't completely airtight
Step 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.
Step 6. Vapour mvoes out of the flask up into other parts of apparatus, leaving behind the less volatile components in the mixture.
Step 7. Once the vapour reaches the cold condenser, it condenses and becomes a liquid which drips into the collecting flask
How to remove acid impurities? Add sodium carbonate and shake the mixture in the separating funnel.
Why do you need to slowly open the tap? Let out CO2 gas formed by reaction of acid with Na2CO3, preventing gas pressure build up.
Final step: Na2CO3 aq. layer removed, organic layer washed with water before running both layers off into two separate flasks.

Semelhante

Crude Oils and others quiz
Dale George
Atomic Structure and the Periodic Table
Ebony Scarlet
0654 Chemical Techniques Quiz
Jeffrey Piggott
0654 Topic C14 Organic Chemistry Quiz
Jeffrey Piggott
9G Navarro Sequence In Seperating Mixture
Reinier Navarro
Extracting Oils from Plants
oliviaoneill90
Spirits Quizz WSET Diploma Unit 4
Martha Cima
American Whiskey
Martha Cima
Spirits Production
Martha Cima
Separating soluble substances 123
The Punisher
Atomic Structure and the Periodic Table
Ava Farrar