Final answer:
Measuring the distance between the burette's liquid level and the beaker's liquid level ensures accurate volume measurements, crucial for experiments like titrations. The meniscus is read at eye level to avoid parallax errors.
Step-by-step explanation:
You should measure the distance between the liquid level in the burette and the liquid level of the beaker to ensure accurate volume measurements when conducting experiments such as titrations. A burette is a precise instrument that can measure liquid volumes to the nearest 0.01 mL. To record the volume correctly, read the level at the bottom of the meniscus, which is the lowest point of the liquid's curved surface when looking straight at the level of the liquid. This practice prevents parallax errors and ensures that volume readings are consistent and reliable.
Additionally, in volumetric glassware like graduated cylinders, pipettes, or volumetric flasks, it's important to mentally subdivide the distance between marked graduations to estimate the volume accurately. You must also ensure that the equipment is level to avoid any tilt that could affect the measurement.