LAB SAFETY & EQUIPMENT

SAFETY SYMBOLS BIOHAZARD SHARP OBJECTS TOXIC EYE PROTECTION REQUIRED ELECTRICAL CHEMICALSDANGEROUS FUMES

FLAMMABLE HOT SURFACE OPEN FLAME

BASIC RULES Conduct yourself in a responsible manner at all times in the laboratory. READ & Follow all written and verbal instructions carefully. If you do not understand a direction or part of a procedure, ASK YOUR TEACHER BEFORE PROCEEDING WITH THE ACTIVITY. When first entering a science room, do not touch any equipment, chemicals, or other materials in the laboratory area until you are instructed to do so. NO food or beverages allowed in the laboratory. No fooling around in the laboratory. Horseplay, practical jokes, and pranks are dangerous and prohibited. Do not wander around the room, distract other students, startle other students or interfere with the laboratory experiments of others. Keep work area clear and clean up your area at end of lab or before leaving class. READ all labels carefully. Know what you are using Dispose of all chemical waste properly. Never mix chemicals in sink drains. Sinks are to be used only for water. Check with your teacher for disposal of chemicals and solutions. Know the locations and operating procedures of all safety equipment including: first aid kit(s), and fire extinguisher. Know where the fire alarm and the exits are located. Report ALL accidents & spills immediately to the teacher. Broken glass SHOULD NOT be thrown in the trash. There are red containers for broken glass disposal. If you spill a chemical at your station, pour water over it…tell the teacher…follow instructions for cleaning up spill Answers to 4-8 found on this slide

EQUIPMENT TEST TUBE TONGS BALANCE GRADUATED RING STAND

PETRI DISH BEAKER FORCEPS PIPET

. #11. use a BALANCE to find the mass of an object #12. mass of an empty beaker….should be close to 90 grams (don’t forget units!) #13. mass of graduated cylinder…should be close to 17 grams #14. use a graduated cylinder to find a volume of liquid #15. to determine the mass of water: get mass of beaker…get mass of beaker + water …subtract mass of beaker…this leaves you the mass of water #16. the mass of 25 ml of water would be about 25 grams #17. use a THERMOMETER to find the temperature; the temperature of the water in the beaker should be about 20 o Celcius #18. the WIDTH of the paper is cm #19. to convert cm into mm…move decimal one place to right; therefore the paper’s width in millimeters would be 217 mm