1. Find 6 things that are unsafe

2. Laboratory Safety practices & procedures

3. Laboratory
Hands-on experiences are essential to learning in science class, but safety must be the first concern!
The following rules exist for your safety.
These rules help to prevent accidents in the lab and allow for more efficient work to occur.

4. Pre-Lab Preparation Read the entire procedure before you begin.
Read chemical labels and SDS (Safety Data Sheets) sheets for chemicals
Example: Acetone
BAKER SAF-T-DATA Guide
Memorize the safety precautions. Be familiar with the instructions for the experiment. Only materials & equipment authorized by me should be used.
Read chemical labels

6. Pre-Lab Preparation
Listen to all instructions. When in doubt about a procedure, ask me.
When first entering the science room, do not touch any equipment, chemicals or other materials until you are instructed to do so.
Do only the assigned experiment.
NEVER enter the room if unsupervised (you don’t see me, don’t come in!)

7. Pre-Lab Preparation
Know the location and operation of the following safety equipment:
Fire extinguisher
Fire blanket
Emergency shower
Eyewash station
Exhaust fan
First Aid Kit
Chemical Spill Kit
Gloves
Goggles

8. Fire Extinguisher
Fire extinguishers are distinguished based on the types of fires on which they are effective. These fires are classified by their fuel source and assigned identifying letters as follows:
They are small metal canisters that contain compressed gas (usually nitrogen) that, when activated, propel a directed spray of flame-retardant chemicals. Fire extinguishers are only effective if building occupants understand where and why they are used.

11. Laboratory gloves Recommended when handling chemicals and glassware.
Playtex non-disposable gloves & heavier, market-style. Thick gloves work the best to protect your hands from spills, cuts, and burns; however, they can make it difficult to handle small pieces of glassware.
Latex gloves. These gloves do not protect you from solvents or corrosives; these chemicals actually degrade the glove on contact. Latex gloves do provide a small level of protection from solid chemicals and solvents, and they make it easier to handle glassware without breaking it. But if you are handling solvents, these gloves give you a false sense of security, as the solvent could go right through the glove.
Nitrile gloves are a relatively new type of glove that combines the best attributes of both thick Playtex and thin Latex gloves. These gloves are thin enough to allow easy glassware manipulation, while they are resistant to solvents such as methylene chloride for up to 4 minutes.
Recommended when handling chemicals and glassware.

12. Pre-Lab Preparation
Know the location of emergency exits and escape routes. To make it easy to exit quickly, do not block walkways with chairs.
Protect your clothing and hair from chemicals & sources of heat.
MUST tie back long hair & roll up loose sleeves when working in the lab.
Avoid wearing bulky or loose-fitting clothing. These items can cause you to knock things over or catch items on fire. Wear pants, not shorts or skirts.
Remove dangling jewelry.
Nylon & polyester fabrics burn & melt more readily than cotton, so wear cotton clothing if you can.
MUST wear closed-toe shoes on lab days.

13. Proper laboratory practices
Report any accident, no matter how minor.
Misbehavior CANNOT and WILL NOT be tolerated!
Immediately notify your teacher of any unsafe conditions you observe.
Work with your group at your station only (that means Group #1 is not across the room with Group #4)
Even with well-designed & tested lab procedures, an accident may occur while you are working in the lab.

14. Proper laboratory practices
Wear safety goggles at ALL times when working on a lab.
Do not rub your eyes in lab or touch your face.
These goggles are designed to protect your eyes form injury.
If, despite these precautions a chemical gets in your eye, remove any contact lenses and immediately wash your eyes with a continuous stream of lukewarm water for at least 15 minutes.

15. Proper laboratory practices
Food, beverages, chewing gum, cosmetics are NEVER allowed in the lab.
Never taste or smell chemicals or touch them with your bare hands.
Always keep your hands away form your face & mouth while working even if you are wearing gloves.

16. Proper laboratory practices
Use a flint striker to light a Bunsen burner.
Do not use matches.
Be sure that all gas valves are turned off and that all hot plates are turned off and unplugged when you leave the lab.
Be careful with hot plates, Bunsen burners, & other heat sources.
Do not use electrical equipment with frayed or twisted cords or wires.
Do not touch a hot plate after it has just been turned off. It is probably hotter than you think. The same is true of glassware, crucibles, and other things after you remove them from a hot plate, drying oven, or the flame of a Bunsen burner.
If you are burned, immediately run cold water over the burned area for several minutes until the pain is reduced. Ask a classmate to notify the teacher.
Don’t reach over heat sources.
Be sure your hands are dry before using electrical equipment.
If you spill water near an electrical appliance, stand back, notify me, and warn other students. Recognize that the danger of an electrical shock is greater in the presence of water. Keep electrical appliances away from sinks and faucets.

17. Proper laboratory practices
Don’t use chipped or cracked
glassware.
Don’t handle broken glass.
Separate broken glassware receptacle
Report any chemical spills immediately.
NEVER take any chemicals out of the lab.
Dispose of chemicals as instructed by the teacher.
NEVER put any chemical down the sink unless directed by the teacher.
I will tell you if it is okay for you to do the cleanup.
If you spill a chemical on your skin, wash it off under the sink faucet, & call me.

18. Post-Lab procedures Keep your work area clean & tidy.
In fairness to others, clean all glassware, lab ware, and equipment at the end of the lab. This includes wiping down your area.
Always wash your hands with soap and water before you leave the lab.
Points will be deducted from your lab if your work area is not clean and picked up.

19. Laboratory Techniques
Measuring Liquid Volumes
Beakers are used to measure approximate volumes
Volumetric flasks and pipets are used to measure precise volumes
Graduated cylinders are used to measure accurate volumes
Always read eye level/ bottom of the meniscus.

20. Laboratory Techniques
Transferring Liquids
Do not set the stopper down
To avoid splattering, pour the liquid down a stirring rod.
Use a funnel when pouring liquids into a narrow-mouth container.

21. Laboratory Techniques
Lighting a Bunsen Burner
Ensure rubber tubing is secure. No leaks
Adjust air and gas
While turning on the gas, striker the flint striker to create a spark.
Hottest Part

22. Laboratory Techniques
Heating a Liquid
Direct the mouth of a test tube away from yourself and others.
Never heat a closed container

23. Laboratory Techniques
Heating a Crucible and Evaporating Dish
Heating a crucible in the presence of air.
Heating a crucible in the absence of air.
Heating an evaporating dish

24. Laboratory Techniques
Filtering and Decanting
Place filter paper in funnel and wet slightly. Pour solution slowly with the aid of a glass stirring rod.

25. Laboratory Techniques
Using a Hot Water Bath (vs. ice bath)

26. Laboratory Techniques
Do you pour water into acid or acid into water?
Acid to Water, All is Well.
Water to Acid, What an Accident!

27. What’s wrong in this picture?
Looking into the test tube. Always point away

28. You can eat in the science classroom
True
False

29. You should always wear goggles except when you are…
Using Glass wear
Heating objects
Walking in the hallway

30. it is okay to use the eye wash station as a water fountain
False
True

31. What’s wrong in this picture?
Reaching across equipment (Bunsen burner)

32. Chris breaks a graduated cylinder. What should he do?
Push it under the table
Blame the closest person
Tell Ms. Gray

33. What is the proper way to smell something in a Science Lab?
Wafting

34. What’s wrong? Identify the different safety concerns shown in the picture below.

35. You and your parents must agree to and sign the safety contract in order to participate in lab activities.

36. Failure to comply with safety guidelines may result in your removal from the class and loss of credit for the work that is done in your absence. Remember I must trust you to do the activities, if I can not trust you then you will be given an alternative assignment

37. Practice SAFE Science

38. The answers are … Don’t fool around during a lab.
Always wear safety goggles when doing an experiment
Always point test tubes and other items away from yourself and others when heating.
Don’t eat or drink while in the lab.
Keep hair and other flammable objects away from flames.
Don’t leave a flame unattended.