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QuestionChemistry

Which piece of equipment should be used to measure 12 mL of DI water? A. Beaker B. Erlenmeyer flask C. 100 mL graduated cylinder D. 25 mL graduated cylinder
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Answer

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Step 1:
Let's solve this step by step:

Step 2:
: Understand the Volume Requirement

The problem asks us to measure 12 mL of deionized (DI) water. This means we need to select the most appropriate measuring device that can accurately measure this small volume.

Step 3:
: Analyze the Equipment Options

A. Beaker: Typically used for mixing or holding solutions, not precise measurements B. Erlenmeyer flask: Used for mixing and reactions, not precise volume measurements C. 100 mL graduated cylinder: Too large for precise measurement of 12 mL D. 25 mL graduated cylinder: Appropriate size for measuring 12 mL

Step 4:
: Evaluate Precision

- A 25 mL graduated cylinder has smaller increments - It can measure volumes between 0 - 25 mL with good accuracy - 12 mL falls well within its measurement range

Step 5:
: Reasoning

The 25 mL graduated cylinder provides the most precise measurement for 12 mL of DI water, as it: - Has appropriate volume range - Allows for accurate reading of small volumes - Minimizes measurement error

Final Answer

D. 25 mL graduated cylinder