a mad scientist’s lab safety presentation · 2018. 9. 10. · lab procedures •prepare a clear...
TRANSCRIPT
Lab Safety
Rules and Guidelines
The Big No-No’s• No eating or drinking in the lab.
– This means no gum, cough drops,
applying chapstick, chewing hair ends,
holding a pencil in your mouth, nail-biting,
etc.
– Never use lab glassware as food or drink
containers.
– Never taste any substances.
– Never inhale chemicals.
• No Horseplay of any kind.
• The only things you should be doing in the
lab are what I’ve told you to do.
Protect Yourself…• Use proper safety protection
– Goggles for eyes
– Lab apron to protect clothes
– Gloves to protect hands (chemical/heat)
• Tie hair back…its flammable!
• Roll up long sleeves & remove dangling
jewelry.
• Touch substances only when told to do so
• Smell substances using the proper technique
(wafting fumes toward you)
• Wash hands after handling substances and
before leaving the Lab
Lab Procedures• Prepare a clear work environment
– No books in the way
– Only materials needed for lab
• Read ALL instructions and wait for
permission to start; do not touch
materials until instructed
• Work calmly and carefully
• Observe good housekeeping
practices. Work areas should be kept
clean and tidy at all times.
• Inform the Mr. Banks of any spills so
they can be cleaned up properly
More Lab Procedures• Inform Mr. Banks of any broken
glassware
• Report broken or damaged equipment
immediately (DO NOT USE IT)
• Clean up work area completely when
you are finished
• Report all accidents or injuries to Mr.
Banks immediately (no matter how
minor)
Even More Lab Procedures• Wash hands after experiments.
• Be careful when using chemicals.
• Be precise and accurate in
measurements.
• Use caution around heat sources and
never reach over a flame.
• Never leave an experiment
unattended.
• When carrying sharp objects, carry
them with the point down.
Safety Equipment…
What and
Where?
Symbols…General
Warning
Biohazard
Explosive
Corrosive
Fire
Poison
NATIONAL FIRE PROTECTION
ASSOCIATION
(NFPA) HAZARD LABELS
Time for a presentation
How does a fire extinguisher work?
Time for a presentation
How does a fire extinguisher work?
• We can replicate the function of some fire
extinguishers using baking soda and vinegar.
Time for a presentation
Time for a presentation
O2
O2 O2 O2
O2
O2O2
O2O2
O2
CO2
CO2
CO2
CO2
CO2
CO2
CO2
CO2
H2O
H2O
H2OH2O
H2OH2O
O2
O2
CO2
CO2
CO2
Time for a presentation
How does a fire extinguisher work?
• We can replicate the function of some fire
extinguishers using baking soda and vinegar.
• What is putting out the fire?
Sodium bicarbonate and vinegar => Sodium acetate and water and carbon dioxide
NaHCO3 + CH3COOH => CH3COO-Na+ + H2O + CO2 (g)
Time for a presentation
O2O2
O2
O2
O2O2O2O2
O2
O2
CO2
CO2
CO2
CO2
CO2
CO2
CO2
CO2
H2O
H2O
H2OH2O
H2OH2O
O2
O2
CO2
CO2
CO2
CO2
CO2
CO2CO2
CO2
CO2
CO2
CO2
CO2
Time for a presentation
O2O2
O2
O2
O2O2O2O2
O2
O2
CO2
CO2
CO2
CO2
CO2
CO2
CO2CO2
CO2
CO2
CO2
CO2
CO2
Time for a presentation
• Ours is a Class ABC extinguisher and is able to
put out a wide range of fires
– Instead of CO2, it releases a powder flame retardant
chemical that prevents oxygen from reaching the fuel.
Thus extinguishing the fire in a similar manner to what
we just saw.