Lab Safety Review 1 Before starting any lab
Lab Safety Review
1. Before starting any lab experiment, you must: § listen to the teachers instructions; read lab instructions § gather necessary materials § wait till you get the go ahead
2. After a lab you must: § clean & put away all lab equipment § Note: Use right sized brush for test tubes § Report broken, chipped or cracked equipment to the teacher § wash your hands § work on your lab report
3. When heating a test tube you must: § put your safety goggles on § tie back loose hair § ensure that you have no loose clothing § use tongs § use a test tube made of “pyrex” or “kimax” § point it away from others § heat in a circular motion using clamp to hold
4. If you drop and break glassware you must: § identify any chemicals present and notify the teacher § sweep up the glass and place it in the glass disposal container
§ 5. If you spill a chemical, you must: § tell your teacher immediately § clean up as per teacher’s instructions – for acid use baking soda, for base use boric acid
6. If a chemical is splashed in your eye, you must: § Never rub eye; wash your eye in the eye wash station for 15 minutes or cold water (slows down the reaction) § Never put another chemical on it § notify the teacher
7. When smelling a chemical, you must: § hold flask away from your face § waft the fumes with your hand § There is no fooling around or food and drink allowed in the lab. § Lab safety song
Fire Extinguisher § On wall at rear of room § How to use: § P – pull the pin § A – aim low § S - squeeze the trigger § S - sweep back and forth to cover all areas § Fire extinguishers come in different forms § Chemical (dry/power, wet) § Water § NEVER USE A FIRE EXTINUISHER ON A PERSON
Student on fire § STOP, DROP and ROLL § If fire does not go out, use the fire blanket ( on top of self) § NEVER USE A FIRE EXTINGUISHER ON A PERSON
Assignment § Safety in the Lab worksheets
Safety Symbols: § Hazardous products are identified by safety symbols § Each symbol has a border and an illustration to describe the hazard § There are symbols for two systems: Household and Workplace
Assignment - On the sheet provided identify which symbols are Household Hazardous Products (HHPS) and which symbols are Workplace Hazardous Materials Information System (WHIMS) - describe when each border (octagon, triangle, circle) is used - Refer to your textbook, p. 518
WHMIS: Workplace Hazardous Material Information System § This system is universal Circle – Red – Dangerous § Octagon – Red – Extreme Danger § Yield/triangle – Yellow – Caution § Diamond – orange – extreme warning
Common Lab Equipment § Fill out the worksheet §
Beaker & tongs § Used to store, mix § Made by Pyrex & Kimax
Erlenmeyer Flask § Used to mix § Use rubber stopper for storage
Florence Flask § Used for mixing, or storage § Can be used for heating
Graduated Cylinder § Accurate liquid measuring § The smaller the cylinder the more accurate it is § Meniscus – read from the bottom of the meniscus curve
Funnels § Used for pouring liquids § Can use paper filters – filtration
Triple – Beam – Balance § Measures mass in grams
Test tubes & clamp § Heating § Mixing § Must be held with a clamp
Tongs § Holding the beaker § Hold small items to heat/burn
Stir rod & Scoopula § Scooping and mixing materials § Used for powders
Crucible heats to very, very hot
Evaporating dish § Allows crystals to form through evaporation
Mortar and Pestle § To grind dry chemicals
Bunsen Burner § heating
- Slides: 28