5005 Praxis 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 ideal for measuring 21.7 mL of water. Its marked increments allow for fine readings.
An eyedropper is not suitable for this volume, as it typically measures much smaller amounts, leading to inaccuracies. A test tube lacks precise measurement markings, making it difficult to gauge the exact volume. Lastly, while a plastic beaker can hold liquids, its graduated markings are often less precise than those on a graduated cylinder, resulting in potential measurement errors.
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