Multiple Choice
In a conductivity apparatus, like the one above, you should never touch the electrodes while the power is on. Which part should you avoid touching to ensure safety?
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4. BONUS: Lab Techniques and Procedures
Laboratory Materials
Multiple Choice
According to the video, why should a used chemical container never be refilled?
A
Refilling containers is prohibited only for flammable chemicals.
B
It may contain residues that could contaminate the new chemical.
C
Refilling containers helps reduce chemical waste.
D
Used containers are always sterile and safe for reuse.
Verified step by step guidance1
Understand the importance of chemical container safety: Used chemical containers may have residues from the previous chemical stored inside.
Recognize that these residues can react with the new chemical, potentially causing contamination or hazardous reactions.
Note that refilling containers is not limited to flammable chemicals; it is a general safety rule to prevent contamination.
Consider that even if a container looks clean, microscopic residues can remain and compromise the purity and safety of the new chemical.
Therefore, the best practice is to avoid refilling used chemical containers to ensure chemical integrity and safety.
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