Which of the following instruments is commonly used to make high-precision measurements in a chemistry laboratory?

• A. Analytical balance
• B. Graduated cylinder
• C. Erlenmeyer flask
• D. Beaker

Answer: (A)

Verified step by step guidance

1. Understand the purpose of each instrument listed: an analytical balance, graduated cylinder, Erlenmeyer flask, and beaker.
2. Recall that an analytical balance is designed to measure mass with very high precision, often to the nearest 0.1 mg or better, which is essential for quantitative chemical analysis.
3. Recognize that a graduated cylinder is used to measure liquid volumes but with less precision compared to volumetric flasks or pipettes.
4. Note that an Erlenmeyer flask and a beaker are primarily used for mixing, heating, or holding liquids and are not intended for precise measurements.
5. Conclude that the instrument commonly used for high-precision measurements in a chemistry laboratory is the analytical balance.