Admin Table of Contents
- 1 Why is burette and pipette rinsed with the solution beforehand?
- 2 Why is a pipette necessary to rinse with the solution?
- 3 Why did you need to rinse the Buret with base before you completely fill it with NaOH?
- 4 Why is burette used for titration?
- 5 When cleaning the volumetric pipet which of the following should you use?
- 6 Why cleanliness of glassware is important?
Why is burette and pipette rinsed with the solution beforehand?
If you rinse the burette with the solution to be used, then any tiny amounts of liquid remaining are the same as the solution used to fill the burette, so they will not change the concentration of the solution in any way. This is to prevent contamination.
Why is a pipette necessary to rinse with the solution?
This water can act as a contaminant to the solution while titration, so rinsing and re-rinsing are done with the solution it is going to be filled with, is done so that no water is left in the pipette. Thus, rinsing is done to get rid of the residual water of the pipette.
What is the Buret rinsed with and why?
The second and more important reason for rinsing your burette has to do with water. If the burette is not completely dry by the time you use it, the remaining traces of water on the inside will make your titrant more dilute and thereby change its concentration.
Why did you need to rinse the Buret with base before you completely fill it with NaOH?
Before filling burette with NaOH solution, students must first rinse the burette with a small amount of NaOH solution. Since DI water will slightly dilute NaOH solution used, it will make the experimental result artificially higher.
Why is burette used for titration?
Burette is used to add titrant to the titrated solution and it has a scale on the side, so that you can precisely measure volume of the added solution. Burette is similar to the pipette, as it is designed to measure volume of the delivered liquid, but it can measure any volume of the solution.
Should you always rinse your pipet Buret with the solution you plan to measure?
As with the pipette, the burette should be rinsed with distilled water followed by the solution it is to be filled with to avoid contamination issues. This is important, as the burette is calibrated to include this volume.
When cleaning the volumetric pipet which of the following should you use?
Clean pipets and volumetric flasks using warm soapy water. The glassware may require scrubbing with a brush. Rinse with tap water followed by 3-4 rinses with deionized water.
Why cleanliness of glassware is important?
Cleaning laboratory glassware is important because contaminated or dirty glassware can lead to inaccurate results in the lab. This tells you that the surface is free of grease and other contaminants that could alter the volume being measured or introduce impurities into the liquid.