Titration, also known as titrimetry, is a method used to determine the concentration of an unknown solution by comparing it to the concentration of a known solution in the presence of an indicator. Titration is a quantitative as well as volumetric technique. To carry out the titration, you will need different apparatus, such as a pipette, burette, conical flask, volumetric flask, beaker, etc.
Before performing the titration experiment, ensure that the titration apparatus or glassware are properly rinsed with deionized water to remove any sample residue. Before taking the initial reading of the burette, make sure the tip is clean and dry. Once your burette is conditioned and filled without any air bubbles or leakage, take an initial volume reading.
How do you remove air bubbles from the burette tip?
By draining some volume of titrant into a beaker, we eliminate air bubbles that may be present at the tip of the burette as well as the stopcock. If the bubbles persist, you can try forcing the titrant through the burette tip at a higher rate. Then grasp the burette and slightly jerk it down when the stopcock is open.
How does an air bubble affect titration?
If an air bubble is present during the titration, the volume reading may be inaccurate. Throughout the titration, the amount of air released from the tip will be counted along with the amount of titrant that has already left the burette.
This indicates that the volume of solution delivered through the tip will not equal the volume determined by taking the final burette reading and subtracting it from the initial reading.
Why are air bubbles in the burette tip a possible source of error in a titration experiment? How do you remove air bubbles from the burette tip?
Burets measure how much volume of liquid is released through the tip. During the titration, the amount of air released from the tip will be counted along with the volume of the titrant that has already left the burette.
This means that the volume of liquid delivered through the tip will not be the amount calculated by subtracting the final burette reading from the initial burette reading. This cause error in calculations and therefore it is considered a possible source of error in a titration experiment.
The following are different ways to remove air bubbles.
- When you quickly open the burette valve, the air bubble is often removed from the tip.
- If you gently tapping the tip of the burette while the titrant is flowing, the air bubble may remove.
- Use a squeeze bulb on the top of the burette to push the liquid out through the tip while the burette valve is open.
Why do bubbles of air rise up through water?
Bubbles are gases, which have a lower density than liquid water. They get pushed up to the surface because they are less dense and rise up as they are lighter than around them.
What will happen if we don't remove the air bubbles from the nozzle of a burette?
While doing the titration if we do not remove the air bubble from the nozzle of the burette, we will get inaccurate results. The process of titration is the one that is used in the analysis. Because the presence of air bubbles results in causes errors in volume readings.
People also ask:
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