Air bubbles in the burette nozzle can lead to decreased precision in measurements. To remove them:
Fill the buret with titrant and open the valve; the pressure of the titrant can force bubbles out.
Reading Buret Tubes:
When reading a buret, ensure that your line of sight is perpendicular to the buret column. Variability in background reflections can affect visibility, leading to errors in readings.
Using a buret card (with a black streak produced by a felt-tipped pen) against a white background provides higher precision in determining relative titrant volumes.
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