What is a chemistry laboratory?
A facility for safely performing experiments and studying chemical reactions.
What are the three practices required for safe science?
Preparedness, professional discipline, and prompt reporting of leaks.
What does preparedness in safe science involve?
Completing requirements and reviewing data sheets.
What does professional discipline in safe science require?
Strict focus and avoidance of carelessness or horseplay.
What must students do when chemical leakage occurs?
Immediately alert the faculty in charge.
What must students complete before entering laboratory activities?
The laboratory pre-report.
What must students review before participating in laboratory activities?
All relevant safety data sheets.
Which behaviors are strictly prohibited in the laboratory?
Horseplay, pranks, eating, and bringing drinks.
What personal protective equipment is required in the laboratory?
Goggles and a hairnet.
What clothing must be worn over a sleeved shirt in the laboratory?
A laboratory apron or gown.
What type of pants are required as personal protective equipment?
Full-length pants.
What type of shoes must be worn in the laboratory?
Closed shoes.
What is the first step in independent instrument access?
Submit a request.
What must be done after attending training for instrument access?
Demonstrate use under guidance.
What must be done every time an independently accessed instrument is used?
Log every use.
What is the safe working height range for a fume hood sash?
30–45 cm
How far inside should chemical equipment be placed in a fume hood?
At least 15 cm (6 in) inside
What must be checked before starting work in a fume hood?
Airflow indicators or alarm
What is forbidden regarding the fume-hood sash position?
Raising it above the safety line
Why should you never put your head into a fume hood?
It is unsafe and prohibited
Can a fume hood be used as a storage cabinet for chemicals or waste?
No, it must not be used for storage
What must be done before opening the gas valve on a Bunsen burner?
Strike the match before opening the gas valve.
What is the initial position of the air hole when igniting a Bunsen burner?
The air hole must be closed initially.
How is the flame adjusted after ignition on a Bunsen burner?
Adjust the air hole to produce a blue heating flame.
What are the steps in laboratory waste management under DENR RA. 6969?
Generation, segregation, containerization, and collection for storage or disposal.
Where should liquid chemical waste be placed?
In a polyethylene carboy.
Which container is used for light-sensitive chemicals?
An amber glass bottle.
What container is appropriate for sharp objects?
A rigid sharps container.
Where do potentially biologically hazardous materials go?
In a biohazard container.
What distinguishes a minor chemical spill from a major spill?
Minor spills are small and easily controlled, major spills involve large quantity or hazards.
What is the first step in responding to a minor chemical spill?
Alerting and protecting personnel.
How are acid spills neutralized during cleanup?
With sodium bicarbonate.
How should base spills be neutralized?
With citric acid or boric acid.
What materials absorb solvent spills?
Activated charcoal or spill pillows.
What should you avoid doing if you suspect a gas leak by smell or sound?
Do not ignite anything or flip electrical switches.
What is the first action if a gas leak is detected and it is safe?
Turn off the nearest gas valve.
What should you do if a gas leak is widespread and unsafe to control?
Evacuate and notify the safety instructor.
Which fire extinguisher class is used for small gas fires?
Class B or C fire extinguisher.
What must never be used on gas or electrical fires?
Water must never be used.
How long should you flush skin or eyes after chemical exposure?
Flush continuously for at least 15 minutes.
What is the procedure for eye exposure to chemicals?
Activate eyewash and hold eyelids open while flushing.
What should be done before touching an electrical-shock victim?
Cut power before touching the victim.
What should you do with the Bunsen burner during an earthquake?
Immediately shut off the Bunsen burner.
Where should you move away from during an earthquake?
Move away from chemical storage shelves, glass cabinets, and active experiment benches.
What is the recommended protective action under a table during an earthquake?
Drop, cover the head, and hold on under a sturdy table or desk.
Where should you stay away from during an earthquake?
Stay away from windows.
What should you never use during an earthquake?
Never use elevators during an earthquake.
Teste tes connaissances avec un QCM de 21 questions sur Organic Chemistry Laboratory Safety.
1. What should a student do immediately after noticing a chemical leak in the laboratory?
2. Which situation best distinguishes a major chemical spill from a minor chemical spill?
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