2. Heat Fire Working with or

3. Heat or Fire

4. When working with heat or fire, you will need to wear safety goggles. To move hot objects you will need to use the right tongs. Different types of containers use different sets of tongs

5. 1.If you have long hair make sure it is pulled away from your face. 2.Use tongs or heavy gloves to handle hot items. 3.Do not put your face or hands over any boiling liquid. 4.When heating chemicals or other materials, be sure the containers are made of heat proof glass. 5.Use a hot plate when specifically instructed to do so.

6. 6.Never point a heated container at anyone. 7.Keep all materials away from heat sources unless specifically instructed to heat it. 8.Handle hot liquids with care. 9.Turn off a heat source as soon as you are finished with it.  Don’t move it until it has cooled.  Leave a note to indicate that a hot plate has been recently used…it doesn’t look hot.

7. Bunsen Burner Safety

8. The laboratory gas burner is designed to heat a small area with a hot flame. This makes the burner useful for heating glassware such as test tubes and beakers.

9. 1.Never use a heat source without wearing safety goggles. 2.Maintain a clean work area and keep all material away from flames. 3.Never leave a flame unattended; when the burner is not needed, turn it off. 4.Never reach across a flame. 5.Make sure you know how to light the burner correctly.

10. 6.Never heat a liquid in a closed container. The expanding gases produced may blow the container apart, harming you or others. 7.Never pick up a container that has been heated without first holding the back of your hand near it. 8.Always use a mitt, clamp or tongs when handling hot containers. REMEMBER: Hot glassware looks the same as cool glassware.

11. Working with Electrical Equipment Electrical Equipment

12. Electrical Hazard

13. 1.Do not leave electrical cords out where someone might trip over them. 2.Keep cords away from heat and water. 3.Never touch electrical equipment or cords with wet hands. 4.Turn off all equipment when you are finished with the investigation. 5.Grasp the plug when you disconnect your equipment. Do not pull on the cord.

14. Working with Sharp Objects

15. Sharp/Pointed Object

16. 1.When cutting, place the object on a flat surface. Do not hold it in your hand while cutting. 2.Always handle sharp instruments carefully. They can cause severe cuts if used incorrectly. 3.Do not walk fast or run with sharp objects in your hands.

17. Working with Chemicals

18. When working with chemicals, you will need to wear safety goggles. Regular eyeglasses do not give adequate protection. Many chemicals require the use of gloves. Check your MSDS or lab write up for the right equipment.

19. Many chemicals can stain or dissolve fabrics. Aprons should be worn to protect your clothing. Check your lab write-up or MSDS to determine if tongs are needed to handle containers of chemicals.

20. You will always use the following in a chemical lab: Goggles Gloves Apron

21. 1.Never touch, taste, or smell any chemical that you do not know for a fact is harmless. 2.Keep hands away from face, eyes,and body while using solutions. 3.Don’t taste papers such as pH or litmus or any test solutions such as Benedict’s solution. 4.Be sure to use the right chemical. Read the label twice. 5.Do not return excess chemicals back to the reagent bottles or to their original containers.

22. 6.Label and date all containers that you use to hold chemicals.  Use a pencil to mark the white patch found on many pieces of glassware. Erase the marks when you are finished.  If there is no white patch, a black china marker should be used. 7.Keep combustible materials away from open flames (alcohol and acetone are combustible.)

23. 8.If the instructions include to note the fumes in an experiment, always gently wave your hand over the opening of a container and direct the fumes toward your nose. This is called wafting. 9.Do not use the same spatula to remove chemicals from two containers. Each container should have a different spatula. 10.Replace all stoppers and caps on the bottle as soon as you are finished using it.

24. Many chemicals that you use are classified as toxic. Toxic substances are poisonous. The toxic substance can be a chemical or a toxin produced by a plant, animal, or pathogenic bacteria.

26. Corrosive Substance

27. Corrosive chemicals are substances that, by direct contact, cause injury to body tissue. The injury may be slight causing a minor burn or irritation or it may be severe enough to destroy body tissue. The chemical action that occurs will depend on the chemical properties of the substance.

29. 1.Acids and bases react easily with other substances. 2.If you get an acid or a base on your clothes or your skin, notify your teacher immediately. 3.Pour acids and bases over the sink, not the counter top. 4.If you need to combine an acid or a base with water, always add acids and bases to water NOT the other way around.

30. Glassware Working with

31. 1.When heating glassware, use a wire or ceramic screen to protect glass ware from the flame of a Bunsen burner. 2.Never use broken or chipped glassware. Dispose of broken glassware in the designated location. 3.Never eat or drink from laboratory glassware.

32. Final Reminders

33. Always follow your teacher’s instructions when:  modifying all lab procedures as needed.  performing activities outside of the lab procedure.  when an injury occurs.  throwing away chemicals and other materials.  cleaning up spilled materials.  cleaning up broken glassware.

34. No Horseplay or Fooling around in the laboratory!

35. Labor + Oratory = Laboratory (Work-then talk about your work!)