Questions and Answers
What is the safest method for filling a pipet?
When diluting strong acids, what is the proper sequence to follow?
What is the recommended action when transporting acids and hazardous chemicals?
How should broken glass be handled in a laboratory setting?
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What precaution should be taken before using electrical equipment in the laboratory?
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What should you do if you come across damaged electrical equipment in the laboratory?
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Why should you never immerse hot glassware in cold water?
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When is it acceptable to leave a lit burner unattended?
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What should you do before handling heated metals and glass?
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Why is it important to determine if an object is hot before grasping it?
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Study Notes
Laboratory Safety and Handling Chemicals
- Use rubber bulbs or pipet pumps for filling pipets; never use mouth suction.
- Transfer reagents cautiously by holding containers away from the body.
- Handle acids with extreme care; always add acid to water to dilute, particularly for sulfuric acid, and take precautions against heat generation.
- Use a pan to contain spills when working with flammable liquids; avoid dispensing near open flames or heat sources.
- Never remove chemicals or materials from the laboratory area.
Safe Transport and Handling of Chemicals
- Secure acids and hazardous chemicals when transporting; walk carefully to avoid spills.
- Carry long glass tubing vertically to reduce breakage risk.
- Use a brush and dustpan for cleaning broken glass; dispose of it in designated containers.
Glassware Handling Precautions
- Lubricate glassware before inserting into stoppers; wear protective gear when handling glass.
- Report any "frozen" glassware in stoppers to the instructor for removal help.
- Fill wash bottles with distilled water only for specific tasks like rinsing.
Electrical Safety
- Always grip the plug when removing electrical devices from sockets; keep hands dry to avoid electrical hazards.
- Inspect glassware for chips or cracks prior to use; never use dirty or damaged glassware.
- Report damaged electrical equipment immediately, including frayed cords or loose connections.
Equipment Use and Heating Substances
- Ask for help when unsure about equipment use.
- Prevent hot glassware from shattering by avoiding immersion in cold water.
- Exercise caution with gas burners; keep hair and clothing away from flames and do not place substances in the flame unless instructed.
- Never leave a lit burner or heated items unattended; turn off equipment when not in use.
Testing and Handling Hot Items
- Follow proper techniques for heating and boiling liquids in test tubes; do not point open test tubes at yourself or others.
- Allow heated metals and glass to cool before handling; utilize tongs or heat-protective gloves.
- Do not look directly into heated containers or place hot apparatus on desks without an insulating pad.
- Determine if glass is hot by cautiously bringing the back of your hand close to it before touching.
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Description
This quiz covers essential safety procedures in the chemistry lab, including the proper techniques for handling pipets, acids, and flammable liquids. Learn the best practices to ensure a safe working environment while conducting experiments. Each question reinforces the importance of safety in handling hazardous materials.