To read the volume from a buret, observe the bottom of the meniscus and report the measurement to the nearest 0.01 mL, ensuring the number of significant figures reflects the precision of the buret.
The question asks for the volume measurement from a buret used in a titration analysis to the nearest 0.01 mL. When reading a buret, we look at the bottom of the meniscus and report the value with the appropriate significant figures. With a typical buret allowing for volume measurements to the nearest 0.01 mL, one would mentally subdivide the distance between two marked volumes and read the value at the bottom of the meniscus.
For example, if the bottom of the meniscus is midway between the 21.00 mL and 21.10 mL marks, we would read it as 21.05 mL. It is important to accurately measure volumes during titrations because the significant figures reflect the precision of the measurement, which is crucial in indicating the end point where the indicator changes color. As per the information provided, significant figures up to three decimal places may be the maximum reliable precision for such measurements.