Question 16

Place the cylinder on a level surface and read the bottom of the meniscus.

To accurately measure liquid in a graduated cylinder, it is essential to place the cylinder on a level surface and read the bottom of the meniscus. This technique ensures that the measurement is precise, as the meniscus is the curved surface of the liquid, and reading from the bottom minimizes errors.

A) Place the cylinder on a level surface and read the top of the meniscus.

While placing the cylinder on a level surface is correct, reading the top of the meniscus can lead to inaccuracies. The correct approach is to read the bottom of the meniscus to obtain the most accurate liquid measurement.

B) Hold the cylinder at eye level and read the bottom of the meniscus.

This option is partially correct in that reading the bottom of the meniscus is appropriate; however, holding the cylinder at eye level does not address the need for the cylinder to be on a stable, level surface. Without this, the reading may still be inaccurate.

C) Hold the cylinder at eye level and read the top of the meniscus.

This option is incorrect as it suggests reading the top of the meniscus, which can result in measurement errors. Additionally, while eye level is important for accurate reading, the priority should be on reading the bottom of the meniscus.

D) Place the cylinder on a level surface and read the bottom of the meniscus.

This is the best procedure as it combines both the necessity of a stable base and the correct reading point, which is the bottom of the meniscus. This method provides the most accurate measurement of the liquid volume.

Conclusion

The correct answer, placing the cylinder on a level surface and reading the bottom of the meniscus, is essential for accurate liquid measurement in a graduated cylinder. All other options either misplace the focus on the meniscus reading or fail to emphasize the importance of a level surface, leading to potential inaccuracies in measurement.