What instrument provides more accurate measurements than a measuring cylinder?

• A. Burette.
• B. Pipette.
• C. Beaker.
• D. Erlenmeyer flask.

Answer: (A)

The main idea here is precision in delivering and reading the amount of liquid. A measuring cylinder is built for estimating volumes and has relatively widely spaced marks, so you get a rough idea of how much liquid is present. The burette, however, is designed for precise measurement and controlled delivery. It has a fine scale along its length and a stopcock that lets you release liquid one small amount at a time. By watching the bottom of the meniscus and reading at eye level, you can determine very small changes in volume, often to 0.1 mL or better. This combination of fine graduations and the ability to dispense gradually makes the burette more accurate for measuring exactly how much liquid has been added. The other instruments are mainly for holding or mixing liquids (they don’t provide the same level of precise measurement), and while a pipette can be accurate for delivering a fixed volume, the burette offers the best precision for variable, step-by-step additions.