LAB SAFTEY and Equipment How to be safe and smart in a lab setting
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Transcript of LAB SAFTEY and Equipment How to be safe and smart in a lab setting
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LAB SAFTEY and EquipmentHow to be safe and smart in a lab setting
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Why be Safe?• In groups of two, write down
three reasons to be safe in the lab.
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Reasons for Being Safe
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Proper Dress• Always wear safety goggles• Do not wear open-toe shoes• Shoes must completely cover the
foot• Remove jewelry from hands and
wrists
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Proper Dress• Tie back long
hair• Do not use
flammable hair products just prior to lab
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Food Rules• Absolutely no food
or drink in the lab!• Do not eat or drink
anything we make in lab (even if it is edible)
• Waft things to smell them
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How to Act• Absolutely,
positively, NO HORSEPLAY!!
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Safety Equipment• Know where the following items
are:• Fire Extinguisher• Safety Shower• First-Aid Kit• Eye Wash
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Accident Procedures• Notify the teacher immediately of
any accident!• Do not clean up spills unless
directed to do so!• Do not pick up broken glass!
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Clean Up• Turn off all burners, gas valves,
and water facets• Unplug any electrical device• Clean your area as directed by
the teacher• Only dispose of wastes as
directed by the teacher• DO NOT POUR LIQUIDS IN THE SINK
UNLESS TOLD TO DO SO!!!!
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Safety Symbols• Safety symbols are used to
indicate possible hazards• Become familiar with the safety
symbols on page xxxi of your text
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Safety Video
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Lab Equipment
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Data Collection• Accuracy refers to how close a
measurement is to the real value or accepted value
• Precision refers to how close a series of measurements are to one another.
• Errors can affect both accuracy and precision.• All experiments should undergo error analysis
• Did I take more than one reading?• Did I use the equipment properly?• Was I objective, or did I make the results turn out
as I expected they might?
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Reading a Graduated Cylinder
• Graduated cylinders are used to accurately measure volume of a liquid.
• Liquids form a meniscus, or curve, when placed in a graduated cylinder.
• Always read the volume from the bottom of the curve.