What instrument is best for measuring the volume of a liquid?

What instrument is best for measuring the volume of a liquid?

• A. Beaker
• B. Graduated cylinder
• C. Ruler
• D. Balance

Answer: (B)

Measuring the volume of a liquid works best with a tool that has calibrated marks along its side. A graduated cylinder is designed for this purpose, with clear scale markings that let you read the exact amount. To get an accurate reading, read the liquid at the bottom of the meniscus (the curved surface) with your eye at the same height as the liquid. The liquid sits in these narrow graduations, giving a precise measurement in milliliters. A beaker can give approximate volumes and is less precise because its markings are few and spaced far apart. A ruler measures length, not volume, and a balance measures mass. If you needed even greater precision, other glassware like volumetric flasks or pipettes would be used, but for measuring liquid volume among these options, the graduated cylinder is the best choice.

Measuring the volume of a liquid works best with a tool that has calibrated marks along its side. A graduated cylinder is designed for this purpose, with clear scale markings that let you read the exact amount. To get an accurate reading, read the liquid at the bottom of the meniscus (the curved surface) with your eye at the same height as the liquid. The liquid sits in these narrow graduations, giving a precise measurement in milliliters.

A beaker can give approximate volumes and is less precise because its markings are few and spaced far apart. A ruler measures length, not volume, and a balance measures mass. If you needed even greater precision, other glassware like volumetric flasks or pipettes would be used, but for measuring liquid volume among these options, the graduated cylinder is the best choice.