Praxis 5005 Practice Test Practice Question
Of the following, which is the best tool for making an accurate and precise measurement of 21.7 mL of water?
Correct Answer: C
Rationale: A graduated cylinder is specifically designed for measuring liquid volumes accurately and precisely, making it the best choice for measuring 21.7 mL of water. Its marked scale allows for fine readings, ensuring minimal error.
An eyedropper is suitable for small volumes but lacks the precision needed for 21.7 mL. A test tube, while useful for holding liquids, does not provide a graduated scale for accurate measurement. A plastic beaker can measure volumes but typically has a lower precision due to its wider opening and less defined markings, making it less reliable for specific measurements like 21.7 mL.
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