Safety in the Science Laboratory A Guide to Success in the Laboratory C. Marsh Rm # C-116 WHS.

Safety in the Science Laboratory A Guide to Success in the Laboratory C. Marsh Rm # C-116 WHS

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.

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.

Conduct yourself in a responsible manner at all times. Follow all written and verbal instructions carefully.

Never Perform an unauthorized experiment. Many chemicals emit dangerous gases or may explode if combined. Never conduct experiments in the laboratory alone.

When entering a lab, do not touch any equipment, chemicals or other materials until you are instructed to do so.

eat or drink from lab equipment. NEVER taste chemicals for any reason. Do not eat food, drink beverages, or chew gum in the laboratory.

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.)

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.

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.

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.

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.

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.

Hygienic Care Wash hands after lab. Keep hands away from face and mouth.

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.

Students are never permitted in the chemistry supply room!!

Goggles must be worn when engaging in or observing activities involving potential hazards to the eye.

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.

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.

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.

If you or your lab partner are hurt, immediately yell out, Code one, Code one to get the instructors attention.

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.

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.

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

Handling Chemicals NEVER return unused chemicals to their original containers!! Opps! too much Ill just put it back.

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!!!

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.

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.

Fill wash bottles only with distilled water and use only as intended.

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.

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.

Follow all instructions given by your instructor. Everyone is responsible for keeping the laboratory a safe environment in which to learn.

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

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

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.

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.

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?

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.

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.

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.

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.

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

Safety in the Science Laboratory A Guide to Success in the Laboratory C. Marsh Rm # C-116 WHS.

Documents

lab manual

lab title

lab equipment

safe lab

lab exercise

lab section

prelab complete

whs slide