Safety in the Science Laboratory A Guide to Success in the
Laboratory C. Marsh Rm # C-116 WHS
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Chemistry Safety This presentation was created following the
Fair Use Guidelines for Educational Multimedia. Certain materials
are included under the Fair Use exemption of the U.S. Copyright
Law. Further use of these materials and this presentation is
restricted.
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Accidents happen every day in many activities. Statistically,
most accidents happen in the home or while driving a car. Few
accidents have occurred in the science classroom. However, in order
to decrease the chances of any accidents occurring, all students
and visitors to the science lab are required to follow the safety
procedures that will follow.
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Conduct yourself in a responsible manner at all times. Follow
all written and verbal instructions carefully.
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Never Perform an unauthorized experiment. Many chemicals emit
dangerous gases or may explode if combined. Never conduct
experiments in the laboratory alone.
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When entering a lab, do not touch any equipment, chemicals or
other materials until you are instructed to do so.
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eat or drink from lab equipment. NEVER taste chemicals for any
reason. Do not eat food, drink beverages, or chew gum in the
laboratory.
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Having a pre-lab complete before beginning any lab exercise
will help insure that you are prepared for the lab.
Name:______________________ Date:______________________ Lab
Section: ____________________ Pre-Lab: questions to answer before
doing the lab For more information on Pre-Labs, go to:
http://www.ncsu.edu/labwrite/pl/pl-home.html Lab Title:
________________________________ 1. Establishing the learning
context for the lab. a. What is the scientific principle (theory or
concept) that you are supposed to be learning about by doing the
lab? (You'll probably be able to figure this out by checking the
lab manual for the title of the lab and the introduction to the
lab.) b. Write down everything you can find out about this
scientific principle. (Look at the lab manual, class notes,
textbook, handouts.) 2. Establishing the goals of the lab. a. List
the objectives for the lab. (The objectives are the concrete acts
you are supposed to perform in the lab, such as to measure
something, to analyze something, to determine something, to test
something, etc. You'll probably find them presented in the lab
manual.) b. In a sentence or two, give the purpose of the lab. (The
purpose tells how achieving the objectives of the lab will help you
to learn about the scientific principle the lab is about.)
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Horseplay, running, pushing, shoving, and practical jokes are a
serious hazard in the science lab. There are many glass objects and
chemicals which could be damaged or could injure you. Such behavior
is not permitted.
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VGood housekeeping is essential in maintaining a safe lab.
VWork areas should be kept clean and tidy. VAll work surfaces in
the laboratory should be cleaned after each use with water.
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VBring only your laboratory instructions, worksheets, and/or
reports to the work area. VMake sure that you place all backpacks
in the desk seat and push outer desk to the inside.
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Know the location of all the exits. Locate the nearest sink and
shower. Know the location of the fire extinguisher, fire blanket,
and eye washes. Your teacher will point these out to you before
doing any lab activities.
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Be alert and proceed with caution!! Notify your instructor
immediately of any unsafe conditions Dispose of all chemicals
properly. Never mix chemicals in sink drains. Sinks are to be used
only for water and those Solutions designated by the
instructor.
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Hygienic Care Wash hands after lab. Keep hands away from face
and mouth.
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Experiments must be personally monitored. NEVER leave an
experiment unattended. Do not wander around the room, distract
other students, or interfere with the laboratory experiments of
others.
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Students are never permitted in the chemistry supply
room!!
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Goggles must be worn when engaging in or observing activities
involving potential hazards to the eye.
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Contact lenses should not be worn while doing experiments. When
labs are assigned that require you to remove contact lenses, be
sure to bring you containers and solution.
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Dress properly during a laboratory activity. Long hair must be
tied back during lab. Dangling jewelry and loose or baggy clothing
must be secured. Shoes must completely cover the foot. No
sandals/flip flops.
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Report all accidents and injuries to your teacher immediately.
Dont be afraid to tell the teacher of an accident because you broke
a rule. The threat of infection or other side effects of the
accident are more important than the reprimand the teacher may give
you for breaking the rules.
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If you or your lab partner are hurt, immediately yell out, Code
one, Code one to get the instructors attention.
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If a chemical splashes in your eye(s) or on your skin,
immediately flush with running water for at least 20 minutes.
Notify someone immediately.
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Chemical Safety All chemicals in the laboratory are to be
considered dangerous. Never taste. Dont eat or drink in lab. Label
all bottles containing chemicals. Never transfer substances with
mouth pipette. Never return unused chemicals to original
container.
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Chemicals Check the label on the chemical bottle at least twice
before removing any of the contents. Take only as much chemical as
you need. concentration substance concentration substance
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Handling Chemicals NEVER return unused chemicals to their
original containers!! Opps! too much Ill just put it back.
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When transferring reagents hold the container away from your
body. When pouring use a stirring rod to control the flow of the
liquid. ALWAYS add acid to water!!!
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Take great care in noting odors or fumes. Use a wafting motion
of the hand. NEVER put a bottle to your nose and breathe
deeply.
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Never try to pick up broken glass. It should be swept up
carefully. Broken glass in sinks should be promptly removed as it
presents a serious hazard to all using the sink. Notify your
teacher when this happens.
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Fill wash bottles only with distilled water and use only as
intended.
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Make certain that all hot plates and open burners are turned
off when leaving the laboratory. Never heat a closed container. The
stopper could act as a projectile.
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In case of emergency-DO NOT RUN. Leave by the nearest safe
exit. DO NOT SCREAM OR YELL. Screaming will only create confusion.
Excessive talking keeps the instructor from hearing when someone
could be injured. Please refrain from talking loudly during
lab.
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Follow all instructions given by your instructor. Everyone is
responsible for keeping the laboratory a safe environment in which
to learn.
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Fire drill In the even of a fire drill close containers, turn
off gas valves Turn off fume hood Turn off electrical equipment
Exit the room from the door into the hall. Turn right go to end of
hall and exit to the right into the parking lot on the middle row.
Student must take MSDS book
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Tornado drill In the even of a tornado drill close containers,
turn off gas valves Turn off fume hood Turn off electrical
equipment Exit the room into the chemical supply room. Student must
take MSDS book
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Safety Counts Playing in the lab is serious business. If you
think the rules are stupid, read these accounts, and realize just
how dangerous not following the rules can be.
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FOLLOW DIRECTIONS Have you written a pre-lab? Do you know the
proper chemicals and procedures? Do you know all pertinent
information about the chemicals you need? Elge Mastrangelo was
doing lab number 40 in his lab book. When he deviated from the
instructions of the lab, he caused a massive explosion that removed
his left hand and severely injured his right.
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GOGGLES SAVE EYES In an experiment in which children were
creating synthetic clouds, it was necessary to build pressure into
a flask. When Charles A. Put too much pressure on the flask, the
glass shattered, sending shrapnel flying around the room and into
his right eye. Do you have all the necessary equipment for the lab?
Is your lab clear of anything that will get in the way? Are you,
your lab partners, and the people around your station wearing
goggles?
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Dont be afraid to TELL A TEACHER Leslie Miller was
participating in a lab using potassium Hydroxide (KOH), A very
dangerous Caustic substance. Some of the crystalline KOH came in
contact with Leslies skin, but she did not tell the teacher. Later
in the day, when the KOH came in contact with the moisture in her
skin, she was too late to stop the damage. By the time she had
received medical treatment, she had caused permanent disfigurement
of her right thigh requiring reconstructive surgery.
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NO FOOD OR DRINKS A 14-year old boy put potassium dichromate in
a bottle of soda two students were sharing in a physical science
lab. The two students became seriously ill and were rushed to a
hospital.
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KNOW YOUR CHEMICALS Do you know what chemicals you are using?
Do you know how they react? Have you followed the precautions not
to cause accidents A student received minor facial injuries when
she added concentrated sulfuric acid to a wet test tube provided by
her lab partner. The contents boiled out of the tube a struck her
in the face. Her lab partner had not dried the tube as
instructed.
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WORK SAFE Students in a high school chemistry class were
studying the difference between mixtures and compounds. In the
first part of the lab sulfur was mixed with iron and the sulfur was
removed by dissolving the sulfur in carbon disulfide. In the second
part of the lab iron and sulfur were mixed in the correct
proportions to make iron sulfide. The sample was heated to bring
about the desired reaction. Unfortunately some of the students were
much faster than others and the two parts of the experiment were
occurring at the same time. One student placed her solution of
sulfur and carbon disulfide in the chemical crock and put the cover
back on. Shortly thereafter a second student placed a hot test tube
in the crock. The resulting explosion sent glass flying in all
directions, fortunately everyone was wearing their goggles and no
one was injured.
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Resources used for this Presentation
http://www.barrysclipart.com/chemistry/chemex.html
http://www.bestclipart.com/linkpages/science.htm
http://agpublications.tamu.edu/clipart/
http://cgl.microsoft.com/clipgallerylive/default.asp