Lab Safety Review

1. Lab Safety Review When should you read and study the lab procedures you are about to perform? ans: before the day of the lab 2. What is the safety precautions that must be worn in the lab at all times? ans: safety glasses/goggles 3. True or False. Contact lenses can be worn in the lab as long as goggles are worn at all times. ans: False

2. 4. ____________________ This type of shoe must be worn in every lab conducted? ans: closed toe shoes 5. How many times should a label be read before removing the contains from the bottle. ans: 2 6. True or False. Any unused chemical should be returned to the original container. ans: false

3. True or False. No food or drink of any kind is permitted in the lab. ans: true • True or False. Always clean your area after every lab and be sure to wash your hands after every lab. ans: true 9. True or False. Never mass any substance directly on the pan of a balanceor scale. ans: true

4. 10. True or False. When heating a test tube, never point the open end toward anybody. ans: true 11. True or False. Hot glassware looks just like cool glassware. ans: true 12. True or False. Always keep combustibles near an open flame. ans: false

5. What is the rule of thumb when mixing acidic solutions? ans: A to W 14. True or False. Long hair and loose clothing must always be pulled back and secure in the lab. ans: true • To who should you report any injury or damage to regardless as to how small the event is? ans: the teacher

6. 16. Where must the eye position be placed when reading the meniscus? ans: level to the meniscus • True or False. To smell a chemical, you should stick your nose into the test tube and take deep sniffs? ans: false 18. What equipment is used to move a beaker on when heating? ans: hot mitts or beaker tongs

7. 19. Which part of a flame is the hottest? ans: the middle cone 20. What is used to hold a test tube into a flame? ans: test tube clamp 21. How full should you fill a test tube with a liquid you want to heat? ans: no more than 2/3 full 22. What is used to separate a solid from a liquid? ans: filtration (filter paper)

8. 23. When lighting a Bunsen burner and the flame keeps being blow out, what does this mean? ans: too much air, close the air vents 24. True or False. Never wear goggles when transferring chemicals. ans: false • Use a _______ ____ to pour a liquid reagent into a test tube or beaker. ans: stirring rod

9. 26. What is the first thing you should do in the case of a cut in the lab? ans: let it bleed then notify the teacher 27. How long should you flush your eyes in the eye wash in the case a chemical should splash into your eye? ans: 20 minutes 28. What is the best way to prevent getting anything into your eye in the lab? ans: wear your safety glasses

10. 29. True or False: *Shoes are optional in lab? *Goggles are only used when working with a flame? *It is cool to conduct any lab even when the teacher is not present? *It is OK to eat in the lab? *It is not OK to eat in the lab but it is OK to chew gum? *Washing your hands after a lab is optional?

11. 30. True or False. *Notify your teacher of any accidents regardless of how small? *Tie or pen back loose cloths and hair? *When using gasoline in a lab, it is good to use an open flame? *Use cracked glassware only when the crack is less than 2 mm? *Always pour water into concentrated acid. *Always clean up your work area after any lab.

12. 31. Identify the following as a qualitative or quantitative observation. 2.5 weeks to grow a tall structure 3.2 g NaOH cool glass beaker brown precipitate volume displacement of 5.5 ml

13. 32. Identify the following as an inference or an observation: BMW cars are cool That blue Infiniti G35 is fast The desk top is hard Mr. Beatty is a cool teacher The wall is blue

14. 33. The branch of chemistry that studies carbon in combination with hydrogen, nitrogen and oxygen is: organic chemistry 34. The branch of chemistry that would study how many milliliter of a produce is formed in a reaction is: quantitative analysis 35. The chemistry of living processes is: biochemistry

15. 36. Gravitational influence of the mass of an object is called: weight 37. The amount of displacement an object take is called: volume 38. The amount of mass present and the space it occupies is called: matter

16. 39. A researcher observe that when the Sun shines on a chemically treated paper, the paper turns black. His hypothesis is ‘ If the UV spectrum is removed from sun light, then the paper will not turn black’. -Which is the independent variable? UV spectrum -Which is the dependent variable? color of the paper -What would be a good title for the graph? UV Affect of Paper Color

17. A visual, verbal, or mathematic explanation is called: a model • What type of line should be represented on a graph? a best fit line • What type of research would a study of the amount of energy released from a hydrogen bond? pure research

18. 43. Using the information found in #42, what would be an ‘applied research’ to that study? adapting the energy in a car 44. The type of graph that shows the distribution of data? bar graph 45. The study of matter and the changes that matter undergoes is called: chemistry

19. 46. A plausible explanation to observed data is called: a theory 47. True or False: Making an inference about an observation is an important part of the scientific method? False 48. Is ductility qualitative or quantitative? qualitative