Chemistry Lab Safety Procedures

Questions and Answers

What is the safest method for filling a pipet?

Using mouth suction to create a vacuum

Simply pouring the liquid directly into the pipet

Using a syringe directly

Using a rubber bulb or pipet pump (correct)

When diluting strong acids, what is the proper sequence to follow?

Add water to acid, stirring continuously

Always add acid to water to minimize heat production (correct)

Mix equal parts of acid and water together in any order

Dilute acid using boiling water

What is the recommended action when transporting acids and hazardous chemicals?

Transport them in a plastic bag for safety

Securely hold them and walk carefully (correct)

Use a cart without securing the containers

Carry them loosely to avoid spills

How should broken glass be handled in a laboratory setting?

Use a brush and dustpan to clean it up Signup and view all the answers

What precaution should be taken before using electrical equipment in the laboratory?

Ensure hands are dry before touch any electrical components Signup and view all the answers

What should you do if you come across damaged electrical equipment in the laboratory?

Report it and avoid using it until fixed. Signup and view all the answers

Why should you never immerse hot glassware in cold water?

It will cause the glassware to break due to thermal expansion. Signup and view all the answers

When is it acceptable to leave a lit burner unattended?

It is never acceptable to leave a lit burner unattended. Signup and view all the answers

What should you do before handling heated metals and glass?

Allow them to cool and use tongs or gloves if necessary. Signup and view all the answers

Why is it important to determine if an object is hot before grasping it?

Hot and cold glass have similar appearances; touching hot glass can cause burns. Signup and view all the answers

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.

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.