Which laboratory device is most appropriate for accurately measuring 100. ml of water?

• A. A test tube
• B. A 100 ml Erlenmeyer flask
• C. A 250 ml beaker
• D. A 100 ml graduated cylinder

Answer: (D)

Verified step by step guidance

1. Understand the purpose of the question: it asks which laboratory device is most appropriate for accurately measuring 100 mL of water.
2. Recall that accuracy in volume measurement depends on the design and calibration of the device. Devices like test tubes, Erlenmeyer flasks, and beakers are generally used for holding or mixing liquids, not precise measurement.
3. Identify that a graduated cylinder is specifically designed for measuring liquid volumes accurately, with clear volume markings and a narrow shape to reduce reading errors.
4. Compare the options: a test tube has no volume markings, an Erlenmeyer flask has approximate volume markings but is not precise, and a beaker is similar with rough volume graduations.
5. Conclude that the 100 mL graduated cylinder is the most appropriate device because it provides precise and accurate volume measurements for 100 mL of water.