Safety A1.1 in the Laboratory
The Plan • Learn about lab safety & become aware of WHMIS guidelines. • Class brainstorm • Minds On activity…Reading an MSDS • Worksheets • Discuss lab equipment
Lab Safety (Personal Conduct) • On Page 7 read safety rules. In Short form write why these rules might exist. • E.g., By reading the instructions I won’t mix the wrong chemicals.
Science Lab Safety Rules (p. 7) • Read all written instructions carefully before doing an activity. • Listen to all instructions and follow them carefully. • Wash your hands thoroughly after each activity and after handling chemicals. • Wear safety goggles, gloves, or an apron as required. • Think before you touch. Equipment may be hot and substances may be dangerous.
Science Lab Safety Rules (p. 7) 6. Smell a substance by fanning the smell toward you with your hand. Do not put your nose close to the substance. 7. Do not taste anything in the lab. 8. Tie back loose hair and roll up loose sleeves. 9. Never pour liquids into containers held in your hand. Place a test tube in a rack before pouring substances into it. 10. Clean up any spilled substances immediately as instructed by your teacher.
Science Lab Safety Rules (p. 7) 11. Never look into test tubes or containers from the top. Always look through the sides. 12. Never use cracker or broken glassware. Make sure you follow your teacher’s instructions when getting rid of broken glass. 13. Label any container you put chemicals in. 14. Report all accidents and spills immediately to your teacher. 15. Read the WHMIS safety symbols on any chemical you are using and make sure you understand the symbols.
Lab Safety (Personal Conduct) • Most lab safety is common sense: 1) Read instructions first 2) Listen to instructions 3) Wear safety goggles 4) Don’t taste anything in the lab
Safety Hazard Symbols • Each hazard symbol displays: • The degree of hazard by the shape and color of the border Yellow triangle: Caution Orange Diamond: Warning Red Octagon: Danger • The type of hazard by the symbol inside the border (See Fig A1.2 on pg. 8)
The symbol inside describes the type of hazard. Example – A skull (poison) inside a red octagon requires only 1g of poison to kill a 200lb man. A skull in an orange diamond requires 5g to kill the same man. A skull in a yellow triangle requires 30g.
Workplace • Hazard • Materials • Information • System WHMIS • Page 8
MSDS: Material Safety Data Sheets • MSDS sheets are provided by the manufacturer & identify the chemical & physical hazards associated with each substance including: melting and boiling points, toxicity, health effects, first aid, spill and clean up procedures.
Reading an MSDS • Do minds on activity… Reading an MSDS. • See Figure A1.5 (pg. 9). • Work with a partner.
Minds On… Reading an MSDS • List 3 synonyms for the name “bleach.” • Bleach solution has 2 ingredients. What are they? Which of these are hazardous? • Find the hazard identification section. Under “Emergency Overview,” there is a short summary. Find the summary and record it. • Read the list of potential health effects. Copy down the potential health effect caused by eye contact. • Fine the section under “First Aid Measures” and record the instructions for what to do in case of eye contact.
Minds On… Reading an MSDS 6. If a fire were to break out near bleach, should the bleach itself be considered a fire hazard? What special equipment is required to fight a fire in which bleach is present? 7. Suppose someone drank bleach. Should the first aid procedure include inducing vomiting to get the solution out of the person? What other treatments are possible? 8. Find out what is meant by the term “chronic exposure."
Safety Apparel • You must always wear protective eyewear! • You must always wear shoes in the lab. The shoes mustCOMPLETELY cover the foot (no sandals or open-toed shoes allowed). • You may not wear loose clothing in the lab. This type of clothing can easily be dragged through a burner flame or beaker of chemicals. • Long hair must be pinned up or otherwise restrained.
Safe Environment • NEVER put broken glass or metal in a trash can! • Chemicals should be disposed of according to instructions for each chemical. NEVER put chemicals in the trash cans or sinks. • No food or drink.
Safe Work Habits • If you get any lab chemicals on your hands or elsewhere on you, rinse the effected area immediately with water. Before leaving the lab, ALWAYS wash your hands THOROUGHLY! • Take only what you need from a container of reagent. If you accidentally take too much, do not return the excess to the container! Instead, try to share it with your classmates or take the excess to the instructor.
If you engage in unauthorized and/or careless work, you may be expelled from the lab, either for the day or permanently! • Never leave an experiment unattended.
Emergency Planning • In the event of any accident or injury, no matter how minor, notify Mrs.Pilipchuk. • Learn the locations of all safety equipment: fire extinguishers, eyewash stations, showers, and fire blankets.
Never… • Smell anything directly. Use your hand to gently waft fumes towards your nose. • Taste anything in the lab. Taste is not an observation used in high school science! • Put chemicals near flame unless directly told to do so. • Lean over your experiment when adding one chemical to another.
Hair not tied up • Safety glasses not on • Loose clothing • Acetone is flammable • Natural gas hose is taught • What’s wrong here?
Our Lab Safety *Safety station is in the Science Prep Room. *Fire extinguisher is beside Mrs. Pilipchuk’s door. *Fire blanket is behind Mrs. Pilipchuk’s desk. • Use for extinguishing small, starting fires. Clothes on fire, wrap the blanket around the person. *Fire exit route from the laboratory is by the door. • Exit right, turn left, go downstairs. Meet near the Confederation Pool.
Our Lab Safety • School policy on laboratory aprons –wear them at all times. • School policy on eye protection –wear goggles at all times even if wear eye glasses. • School policy on long hair & Bunsen burners- tie hair back. • First aid kit is located in the Lab Prep Room.
Eyewash • Eyewash is located in the Science Lab Prep room. Do not use the one in Mrs. Pilipchuk’s classroom. • To use-Push down on the paddle. Use the eyewash immediately if your eyes are exposed to a hazardous chemical. To use the eyewash: • Immediately flush eyes for at least 15 minutes. • Keep the eyes open & rotate the eyeballs in all directions to remove contamination from around the eyes.
Corrosive Substance • If a corrosive substance is spilled treat with lots of cold running water. Never put anything but cold water on a burn!
Small & Large Cuts • For a small cut • Wash the injury thoroughly with water. • Notify Mrs.Pilipchuk • For a large cut • To stop or slow down bleeding, apply pressure to the wound. • Notify Mrs.Pilipchuk
Assignment • Complete the WHMIS & HHDS worksheets • (p. 7- 12 of note pack)
Lab Equipment • Beaker: used to heat and measure liquids NOT • Test tube: used to heat or seal liquids using a stopper • Bunsen burner: used to heat chemicals in test tubes or beakers using an open flame • Erlenmeyer flask: used to heat or seal liquids using a stopper
Test tube clamp: used to hold a test tube during heating or measuring • Scoopula: used to transfer chemicals from the reagent bottle to another measuring device • Buchner funnel: used with filter paper to separate the filtrate from the liquid • Graduated cylinder: used to measure the volume of a liquid. Keep the bumper ring near the top to prevent breakage if it tips over.
Mortar &pestle: used to grind substances into a fine powder or pulp • Crucible tong: used to pick up and hold items that are too hot to handle • Watch glass: used to mix small amounts of powders or liquids • Pipette: used to add fluid to an experiment • Bulb: used to draw fluid into the pipette
Weigh boat: used to weigh powders on a scale • Safety goggles: protective eyewear used when conducting experiments • Hot plate: used to heat liquids • Burette clamp: fastened to a universal stand to hold test tubes and other apparatus
Other Lab Equipment Medicine dropper: used to add small amounts of liquid to an experiment Iron ring clamp: fastened to support various apparatus on the universal stand Voltmeter: used to measure voltage Ampmeter: used to measure frequency Spot plate: Used to separate miniscule amounts of liquid
Tweezers: used to pick up miniscule items (e.g.,fibers). Funnel: used to filter Test tube rack: used to hold test tubes in an upright position during an experiment Test tube brush: used to clean test tubes
Homework: • Read pages 3 – 11 • A1.1 Check and Reflect p.11 #’s 1, 7 & 11 • Prepare for lab safety & equipment quiz