What Is the Infundibulum?
The funnel is a cylindrical object that is used to inject liquid and fine powder objects into a relatively small inlet. The smaller tubular sections at the funnel mouth can have different lengths. Funnels are usually made of stainless steel or plastic, but paper funnels are also sometimes used for substances that are difficult to clean thoroughly, such as engine oil. Some funnels have a controllable flap at the mouth, allowing users to control the rate of fluid inflow. Funnels are common in the kitchen; funnels can also be found in the laboratory, and sometimes filter paper is used to filter out chemicals such as crystals.
- Funnel is
- 1. Fold the filter paper in half and fold it twice to form a 90 ° center angle.
- filter
- 2. Put the stacked filter paper in three layers on one side and open one layer on the other side to form a funnel.
- 3 Put the funnel-shaped filter paper into the funnel. The side of the filter paper should be lower than the side of the funnel. Pour some water into the funnel mouth to make the soaked filter paper abut the inner wall of the funnel. Then pour the remaining clear water and set aside.
- 4 Place the funnel with the filter paper on the funnel holder for filtering (such as the ring on the iron stand), and place the beaker or test tube containing the filter liquid under the funnel neck, and place the tip of the funnel neck on the wall of the receiving container. Prevent liquid splashes.
- 5. When injecting the liquid to be filtered into the funnel, hold the beaker holding the liquid on the right and the glass rod on the left. The lower end of the glass rod is close to the three layers of filter paper, and the mouth of the beaker is close to the glass rod. The rod flows into the funnel. Note that the level of liquid flowing into the funnel cannot exceed the height of the filter paper.
- 6. When the liquid flows down the funnel neck through the filter paper, check whether the liquid flows down the cup wall and pour it to the bottom of the cup. If not, you should move the beaker or rotate the funnel so that the tip of the funnel is firmly attached to the wall of the beaker, so that the liquid can flow down the wall of the beaker. [1] [2-3]