1. Laboratory Lessons Mrs. Brown’s Room

2. I. Lab Safety

3. Lab Safety:   Accidents in the lab, as in the home or work place, can be prevented if the following three items are followed:   1. Stop to think.   2. Use Common Sense! (Yes, you all have this!)   3. When in doubt, ask the teacher.

4. Personal Protective Equipment Many states require by law that students wear approved safety goggles or safety glasses when in the lab. Many states require by law that students wear approved safety goggles or safety glasses when in the lab. This is an absolute "MUST"! This is an absolute "MUST"! The following is not acceptable! Proper Use

5. Proper attire: Avoid floppy garments Avoid floppy garments These get tangled up in equipment or glassware and cause accidents These get tangled up in equipment or glassware and cause accidents Avoid long, loose hair styles for the same reason. Avoid long, loose hair styles for the same reason. When Bunsen burners are in use, long hair sometimes catches on fire When Bunsen burners are in use, long hair sometimes catches on fire No open toed shoes are to be worn on lab days!

6. Safety Equipment Fire Extinguishers Fire Extinguishers Fire Blanket Fire Blanket Eye-wash Fountain Eye-wash Fountain Safety Shower Safety Shower

7. Fire Extinguisher Operation Locate the "KEY" (the round object) Locate the "KEY" (the round object) Twist the "KEY" to break the stiff Nylon retaining cord Twist the "KEY" to break the stiff Nylon retaining cord Then pull "KEY" out Then pull "KEY" out Do not merely attempt to pull the key straight out, unless you are very strong. Do not merely attempt to pull the key straight out, unless you are very strong.

8. Fire Extinguisher Operation Raise the nozzle in order to direct the stream of carbon dioxide Raise the nozzle in order to direct the stream of carbon dioxide The CO 2 will cool the fire, and restrict oxygen and the fire should go out. The CO 2 will cool the fire, and restrict oxygen and the fire should go out. Squeeze the handle to begin operation Squeeze the handle to begin operation

9. Fire Blanket Usage: Usage: Yank the blanket out of the wall holder. Wrap it around the victim to smother the fire.

10. Eyewash Fountain If you get something from the lab in your eye – Get It Out Immediately! If you get something from the lab in your eye – Get It Out Immediately! Run some water through the eyewash fountain before you use it. Run some water through the eyewash fountain before you use it. Retract your eyelid (hold it open); Retract your eyelid (hold it open); Don’t squint your eyes, this restricts water access. Don’t squint your eyes, this restricts water access. Run fresh water over your eye for several minutes. Run fresh water over your eye for several minutes.

11. Safety Shower Shower should be used for dire EMERGENCY only! Shower should be used for dire EMERGENCY only! If you (or a lab mate) is ON FIRE, position yourself (or your lab mate) under the safety shower. If you (or a lab mate) is ON FIRE, position yourself (or your lab mate) under the safety shower. Pull the handle—a deluge of water will result. Pull the handle—a deluge of water will result.

12. Use of the FUME HOOD Use the HOOD for reactions that give off vapors, especially smelly vapors Use the HOOD for reactions that give off vapors, especially smelly vapors The draft of the HOOD will sweep away vapors so that the lab itself maintains reasonable air quality The draft of the HOOD will sweep away vapors so that the lab itself maintains reasonable air quality

13. Broken Glass Sweep it up right away Sweep it up right away Place broken glass in the proper receptacle Place broken glass in the proper receptacle Do not pick up glass with bare hands. Do not pick up glass with bare hands.

14. II. Use of the Lab

15. Things to do before the lab Read the experimental procedure ahead of lab. NOT as you do the procedure! Read the experimental procedure ahead of lab. NOT as you do the procedure! If there is consistently a failure to read the experiment before the lab then I will be forced to give pre-lab quizzes! (You don’t want this!) If there is consistently a failure to read the experiment before the lab then I will be forced to give pre-lab quizzes! (You don’t want this!)

16. Avoid Horseplay In a laboratory setting, horseplay, even if good-natured, is absolutely unacceptable! In a laboratory setting, horseplay, even if good-natured, is absolutely unacceptable! No pushing! No pushing! No shoving! No shoving! Serious accidents all too often result involving the glassware or solutions in use Serious accidents all too often result involving the glassware or solutions in use Failure to act appropriately will result in serious disciplinary action. Failure to act appropriately will result in serious disciplinary action.

17. TESTING of ODORS Do NOT smell the container directly. Do NOT smell the container directly. If you absolutely must test the odor, carefully waft the vapor from the flask toward your nose with your hand. If you absolutely must test the odor, carefully waft the vapor from the flask toward your nose with your hand.

18. Bunsen Burner Usage Make sure the rubber hoses are firmly attached. Make sure the rubber hoses are firmly attached. Turn up the gas flow until you hear a gentle flow of gas. Turn up the gas flow until you hear a gentle flow of gas. Light the burner by bringing the match UP from the base toward the burner nozzle. Light the burner by bringing the match UP from the base toward the burner nozzle. Remember: down-to- up! Remember: down-to- up!

19. At the end of the lab period: Remember to clean up all spills (this includes water), and throw away all paper towels. Remember to clean up all spills (this includes water), and throw away all paper towels. Be sure that hot plates are unplugged and against the wall, and that the gas valve is in the off position. Be sure that hot plates are unplugged and against the wall, and that the gas valve is in the off position. Return all equipment, chemicals, etc., to its proper place. Return all equipment, chemicals, etc., to its proper place. If the lab paper is due at the end of class be sure to turn it in. If the lab paper is due at the end of class be sure to turn it in.