How to rinse a burette:
· Rinse the buret two to three times with about 15-10 rnL of D.I. water. Be sure that all inner sides make contact with the water. Run some of the water through the tip into a beaker to rinse the tip and stopcock. Discard the rinse water.
· Rinse the buret twice with about 5-10 mL of the solution to be titrated. Be sure that all inner sides make contact with this solution. Run some of the water through the tip into a beaker to rinse the tip and stopcock. Discard the rinse solution into the proper waste container.
3. How to fill a burette:
Use a clean and dry funnel to fill a rinsed buret to about the 0.00 mL mark with the solution to be titrated.
To expel air from the tip and stopcock, run some of the solution out into a small beaker. Tap the tip to dislodge air while letting the solution out. If the beaker is not clean and dry discard this solution in the proper waste container.
Fill the burette somewhere between the 0.00 and 5.00 mL marks. Record this volume.
Do not leave the funnel in the buret since liquid can drip down to give an inaccurate volume.
Now the buret is ready for use.
4. When finished, always rinse the buret with Dl. at least two to three times before returning it.