객관식
Which of the following sets of laboratory tools should be used to record the most complete data about a gas sample during an experiment?
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4. BONUS: Lab Techniques and Procedures
Laboratory Materials
Multiple Choice
Which step should be performed before adding a sample or solvent to a separatory funnel?
A
Heat the funnel to 100 °C
B
Ensure the stopcock is closed
C
Add drying agent to the funnel
D
Rinse the funnel with concentrated acid
검증된 단계별 안내1
Understand the purpose of a separatory funnel: it is used to separate immiscible liquids based on their densities.
Before adding any sample or solvent, it is crucial to prevent any liquid from leaking out through the stopcock.
Therefore, the first step is to ensure that the stopcock at the bottom of the separatory funnel is closed securely.
This prevents accidental spills and allows safe mixing and separation of the liquids inside the funnel.
Only after confirming the stopcock is closed should you proceed to add your sample or solvent.
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