Final answer:
To fill a burette, rinse it with water and the titrant solution, then fill it with the titrant solution while ensuring the liquid level aligns with the volume markings and there are no air bubbles in the tip.
Explanation:
When filling up a burette, the buret should be rinsed with water and the titrant solution to prepare it for filling. After rinsing, the buret is filled with the titrant solution, ensuring that the liquid level aligns with the volume markings and there are no air bubbles in the tip of the buret.
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