Why should one use a glass rod in transferring liquids?
Table of Contents
- 1 Why should one use a glass rod in transferring liquids?
- 2 What is the purpose of a glass stir rod?
- 3 Why do you decant as much of the supernatant liquid?
- 4 What is the function of glass rod in specific heat capacity?
- 5 Why do you decant as much of the supernatant liquid as possible from the reaction mixture before beginning to transfer any of the precipitate?
Why should one use a glass rod in transferring liquids?
Glass stirring rods make for a simple way to transfer liquids from one bottle to another with a much-reduced risk of spilling any, and they are quicker/easier to clean up between flavors than glass funnels.
What is the purpose of a glass stir rod?
A glass stirring rod is used to stir or mix solutions. One of their main uses is to “scratch” the side of glassware (such as an Erlenmeyer Flask) to start the crystallization process in many experiments.
Why do you decant as much of the supernatant liquid?
DECANTATION AND WASHING OF PRECIPITATES We loosely refer to this operation as decantation. Because the precipitate separated from the supernatant liquid by this technique will be wet with decantate, it is necessary to wash the precipitate free of contaminating ions.
How do you decant a supernatant liquid from a solid precipitate?
How to Separate a Supernatant from a Precipitate by Decantation:
- Put a stirring stick on the mouse of the container to avoid trickling of the liquid to the outside of the container.
- Tilt the container and slowly decant the supernatant.
What is the property of liquids that make it stick to the glass rod as it flows down to the other beaker?
Cohesive forces are the intermolecular forces that make the molecules of a liquid stick together and ‘seek’ each other out. In other words, these are the forces that make liquids resist separation.
What is the function of glass rod in specific heat capacity?
Therefore, stirrer assists heat in spreading equally within the mixture. Glass rod however is used in mixing the solids to gain the heat and relate with the temperature of water.
Why do you decant as much of the supernatant liquid as possible from the reaction mixture before beginning to transfer any of the precipitate?
The precipitate is transferred to the filter in several steps. The first step is to decant the majority of the supernatant through the filter paper without transferring the precipitate (Figure 8.2. 8). This prevents the filter paper from clogging at the beginning of the filtration process.