Multiple Choice
Which step should be performed before adding a sample or solvent to a separatory funnel?
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4. BONUS: Lab Techniques and Procedures
Laboratory Materials
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Which of the following should be checked before using a crucible in a laboratory experiment?
A
Confirm the crucible is at room temperature.
B
Ensure the crucible is clean and free of cracks.
C
Check that the crucible is made of plastic.
D
Verify the crucible is filled with water.
Verified step by step guidance1
Understand the purpose of a crucible in laboratory experiments: it is typically used to heat substances to very high temperatures.
Recognize that before using a crucible, it must be clean to avoid contamination of the sample or reaction.
Check the crucible for any cracks or damage because cracks can cause the crucible to break when heated, posing safety risks.
Confirm that the crucible material is appropriate for the experiment, usually made of heat-resistant materials like porcelain or metal, not plastic.
Note that the crucible should be dry and empty before use; it should not be filled with water.
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