Explain how the burette and pipette are cleaned for use in titration
1. Burette Cleaning:
- Rinse the burette with distilled water to remove any dust or particles.
- Fill the burette with a dilute solution of acid (e.g. hydrochloric acid) and let it stand for a few minutes to dissolve any remaining impurities.
- Empty the acid solution and rinse the burette thoroughly with distilled water.
- Repeat the rinsing process with a dilute solution of base (e.g. sodium hydroxide) and then with distilled water.
- Allow the burette to dry or rinse with the titrant solution before use in the titration process.
2. Pipette Cleaning:
- Rinse the pipette with distilled water to remove any dust or particles.
- Use a pipette filler to suck up a dilute solution of detergent or cleaning agent into the pipette.
- Allow the cleaning solution to remain in the pipette for a few minutes.
- Rinse the pipette several times with distilled water to remove any residue of the cleaning solution.
- Rinse the pipette with the titrant solution that will be used in the titration process to ensure complete cleaning.
- Allow the pipette to dry thoroughly before use.
Both the burette and pipette should be handled carefully to avoid any contamination during the cleaning process. It is important to ensure that they are properly cleaned and dried before use in titration to obtain accurate results.