When using a burette in a titration experiment, which of the following practices is most important to ensure accurate measurement of liquid volume?

• A. Ignore the meniscus and read the highest point of the liquid.
• B. Read the liquid level at the bottom of the meniscus at eye level.
• C. Estimate the volume by looking at the side of the burette.
• D. Read the liquid level from above the burette.

Answer: (B)

Verified step by step guidance

1. Understand that a burette is a precise volumetric instrument used to deliver known volumes of liquid, especially in titration experiments.
2. Recognize that the liquid in the burette forms a curved surface called the meniscus due to surface tension.
3. Learn that for accurate volume readings, the correct practice is to read the liquid level at the bottom of the meniscus, which is the lowest point of the curve.
4. Ensure that the reading is taken at eye level to avoid parallax error, which occurs when the measurement is viewed from an angle.
5. Avoid estimating the volume from the side, ignoring the meniscus, or reading from above, as these practices lead to inaccurate volume measurements.