Which type of equipment would be used to precisely measure 26.0 mL of dilute hydrochloric acid?
A. 100 mL beaker
B. 500 mL Erlenmeyer flask
C. 50 mL graduated cylinder
D. 10 mL test tube
The Correct Answer and Explanation is :
The correct answer is C. 50 mL graduated cylinder.
Explanation
When it comes to accurately measuring liquids in a laboratory setting, the choice of equipment is critical. Each of the options listed serves a different purpose and has varying degrees of accuracy.
- 100 mL Beaker: While a beaker is useful for mixing and holding liquids, it is not designed for precise measurements. Beakers have graduations, but they are not calibrated for accuracy, making it difficult to measure volumes like 26.0 mL reliably.
- 500 mL Erlenmeyer Flask: This flask is designed primarily for mixing and heating solutions, with its narrow neck allowing for swirling without spillage. Like the beaker, the Erlenmeyer flask is not suitable for precise measurements due to its larger volume and imprecise graduations.
- 50 mL Graduated Cylinder: This is the best choice for measuring 26.0 mL of dilute hydrochloric acid. Graduated cylinders are specifically designed for measuring liquid volumes accurately. They have clear markings and a narrow shape that minimizes meniscus errors. The precision offered by a graduated cylinder allows for accurate readings, making it possible to measure 26.0 mL with a high degree of reliability.
- 10 mL Test Tube: While a test tube can hold liquids, it is not designed for measuring specific volumes. It lacks graduation markings that would allow for accurate volume measurement.
In summary, the 50 mL graduated cylinder provides the best combination of accuracy and ease of use for measuring 26.0 mL of dilute hydrochloric acid. Its design allows for precise liquid measurement, making it essential for experiments where accuracy is crucial, such as in titrations or when preparing solutions.