Which of the following is the correct way to read the volume in a graduated cylinder?

• A. Read the measurement at the top of the meniscus from above.
• B. Read the measurement at any angle as long as the meniscus is visible.
• C. Read the measurement at the bottom of the meniscus at eye level.
• D. Read the measurement at the bottom of the meniscus from above.

Answer: (C)

Verified step by step guidance

1. Understand that the meniscus is the curved surface of a liquid in a container, caused by surface tension and adhesion between the liquid and container walls.
2. Recognize that accurate volume measurement requires reading the liquid level at the meniscus, not above or at any angle, to avoid parallax error.
3. Identify that the correct practice is to position your eye at the same level as the bottom of the meniscus to ensure an accurate reading.
4. Avoid reading from above or at an angle, as this can cause the volume to appear higher or lower than the true value due to the curvature of the meniscus.
5. Conclude that the correct way to read the volume in a graduated cylinder is to read the measurement at the bottom of the meniscus at eye level.