Question
Label the diagram and explain the process in your words.
Label the diagram and explain the process in your words.
✓
Answer
When filtration is carried out using a vacuum pump it is called filtration under suction. It is a faster and more efficient technique than simple filtration. The diagram is as follows:
ii. Procedure:
ii. Procedure:
- The assembly for filtration under suction consists of a thick wall conical flask with a sidearm (Buchner flask).
- The flask is connected to a safety bottle by rubber tube through the side arm.
- Buchner funnel (a special porcelain funnel with a porous circular bottom) is fitted on the conical flask with the help of a rubber cork.
- A circular filter paper of correct size is placed on the circular porous bottom of the Buchner funnel and the funnel is placed on the flask.
- Filter paper is moistened with a few drops of water or solvent.
- Suction is created by starting the pump and filtration is carried out.
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