Chem Lab Safety
SKIRT
DOES NOT WORK BC OF EXPOSED ANKLES
Which of the following explains why the lab safety policy specifically addresses loose clothing, contact lenses, and large, loose, or dangling jewelry?
All
If you need to work with a flammable or volatile solvent, which piece of lab equipment should you be sure NOT to use
NOT: c. Fume Hood with good ventilation.
When reading the label on a reagent container, what are the three most important pieces of information?
Name, Concentration, Hazard warning(s)
In some circumstances, materials that are being heated in the lab could catch fire. If a flammable substance in a beaker should catch fire while you are working but the flames are relatively contained, what is a simple method for extinguishing the flame?
Turn off the heat source immediately, and use a watch glass to cover the beaker and minimize the oxygen around the flame
When the procedure calls for making a more dilute solution of an acid, or mixing an acid with other solutions, what is the correct order of steps?
a. Always Add Acid - Either add all of the water or non-acid component first, or add a significant portion, before adding the acid to the mixture. This helps to minimize the heat generated, which could otherwise create dangerous fumes or reactions.
How many times should you read the label on a reagent container and compare it with the lab manual?
a. At least twice each time you remove material from the container.
When should you immediately turn off the gas valve for a Bunsen or Meker burner? (Check all that apply.)
a. If the flame suddenly goes out. c. If you smell gas in the room. d. If you must leave the open flame unattended and there is no one else to monitor it.
Which of the following is a behavior that can pose a safety risk in the laboratory environment?
a. Moving rapidly around the lab to be sure to finish the experiment in time. Correct b. Staying focused on your own experiment and not being distracted by what nearby groups are doing. c. Looking away from your work to answer a question from your TA or lab partner. Correct d. Sitting on lab benches, lab floors, or hallway floors, while waiting for lab to begin or for another student to finish. Correct e. Leaving your lab drawer open while you set up your apparatus and obtain your reagents.
When should you be sure to wear full PPE (proper attire, lab coat, goggles) in the laboratory? (Check all that apply.)
a. Once the experimental work has begun. b. During the lab quiz. c. While waiting in the lab room for a friend to finish. d. While cleaning up after experimental work is done. e. As soon as you enter the lab, and until you are ready to walk out the door.
While weighing out a reagent for use in an experiment, a student finds he has leftover reagent. The student should:
a. Place the excess reagent in the appropriate solid or liquid waste container to prevent contamination of the stock reagent.
Your lab partner accidentally spills some acid on his wrist and watchband. You should: (Check all that apply.)
a. Remove the watch and watchband immediately, and rinse his wrist for at least 15 minutes to be sure all hazardous material has been washed away. d. Let the TA inspect his wrist to see if it is okay.
Which of the following precautions is important when using a hot plate? (Check all that apply.)
a. Set up your work space so that wires and cables cannot accidentally make contact with the ceramic surface and melt. Correct b. Never leave the hot plate turned on an unattended. Correct c. Set up the work space so that flammable materials - notebooks, paper towels, other reagents, etc. - are far away from the hot plate to prevent them coming in contact with the hot surface. Correct d. Remember that the ceramic top of the hot plate, and any glassware heated by the hot plate will look the same when hot as cold, and will not cool down until well after the hot plate has been shut off. Correct e. Set up your work space with the hot plate in a secure location away from the edge of the bench so that you won't accidentally bump it and spill hot or flammable liquids.
Which of the following must be completed before taking the quiz?
a. Store your backpack, cell phone, jacket, and all other nonessential items in designated storage areas. CorrectYou must be completely prepared for lab before beginning the quiz. b. Put on your goggles. CorrectYou must be completely prepared for lab before beginning the quiz. Taking the quiz when you are not in complete lab attire is a violation of the Honor Code. d. Put on your lab coat. CorrectYou must be completely prepared for lab before beginning the quiz. Taking the quiz when you are not in complete lab attire is a violation of the Honor Code. e. Tie back long hair. CorrectYou must be completely prepared for lab before beginning the quiz. Taking the quiz when you are not in complete lab attire is a violation of the Honor Code.
What is the most important consideration to preserve safety when it is necessary to feed glass tubing, thermometers, or other apparatus through a rubber stopper?
a. Using the correct hand position so that if something goes wrong you can avoid coming into contact with broken or sharp ends.
For which of the following situations should you be sure to notify your TA and fill out an incident report form? (Check all that apply.)
a. You begin to feel faint and dizzy in lab because you had to skip lunch. CorrectEven though the cause of this issue did not originate in lab, it is important that your TA knows and that an incident report is filed. In this case, your TA would recommend that you take a breat to get water and/or a snack. The lab is a terrible place to faint. You should never attend lab if you have an illness or medical condition that would impair your awareness or ability to function in lab. If you shouldn't drive, you shouldn't come to lab. b. You accidentally pick up a beaker from the hot plate, not realizing that it was already hot, and the edge of the beaker leaves a small red mark on your thumb. CorrectNo matter how small the injury, you should report it to your TA and be sure to wash the area thoroughly to be sure you have washed away any potential contamination. c. You arrive in lab, but realize that your cold medicine is making you feel groggy. CorrectEven though the cause of this issue did not originate in lab, it is important that your TA knows and that an incident report is filed. In this case, your TA would recommend an excused absence. You should never attend lab if you have medication or other substances in your system that impair your awareness or ability to function in lab. If you shouldn't drive, you shouldn't come to lab. d. During lab check-out at the end of the semester, your lab partner accidentally drops a beaker, and a small chip of glass causes a scratch on your ankle because you weren't wearing socks. CorrectNo matter how small the injury, you should report it to your TA and be sure to wash the area thoroughly to be sure you have washed away any potential contamination. e. During check-in you discover a broken funnel in your drawer, and the broken end of the stem causes a small nick through your glove. CorrectNo matter how small the injury, you should report it to your TA and be sure to wash the area thoroughly to be sure you have washed away any potential contamination.
Which of the following is the reason backpacks must be stored during lab?
b. Backpacks on the floor of the lab or on the benches may be exposed to hazardous materials, which might then lead to student exposure outside the lab. Incorrect c. Backpacks on the floor present a tripping hazard to students in lab, which may lead to spills and other incidents.
When dealing with hazardous materials generated in the lab, the two most important guidelines are: (Choose two.)
b. Collect ALL hazardous material for proper disposal. d. Organize the experiment to generate the least amount of hazardous material possible.
What is your BEST resource for understanding the nature of the chemical hazards of materials you work with in lab?
b. Safety Data Sheets (SDS) that should be consulted before coming to lab each week.
Consider the following scenario: A student has prepared a series of analytical solutions to be run on an instrument in another room. The student has worn gloves throughout the preparation of the solutions, and has wiped up all drips and spills that occurred during that process. The student removes her gloves before leaving the lab room and carries her solutions in scintillation vials in a large clean beaker to the room where the instrument is located. Once in the new room, the student obtains a new pair of gloves before dispensing the solutions for analysis. Which of the following changes could improve the student's procedure? (Check all that apply.)
b. The student could have worn a single glove on the hand she used for transporting the solutions to the instrument room, and used her non-gloved hand for opening doors and pushing elevator buttons. Correct c. The student could have worked with her lab partner so that one of them could carry the materials with gloved hands, while the other opened doors and pressed elevator buttons with non-gloved hands. Correct d. The student could have chosen a plastic bin, or other less breakable container to carry her solutions to the instrument so that she wasn't carrying glassware with her bare hands.
When should you be sure NEVER to use a sealed container and/or secondary containment in the laboratory?
b. When heating a solution over a hot plate, burner, or heating mantle.
Your lab partner accidentally gets a mist of your solution in her eye. You immediately help her to the eye wash to rinse it. After about a minute, she feels better and is ready to get back to work. You should:
c. Keep her in the eye wash for at least 15 minutes, and then make sure she goes to student health, just to be sure.
In some circumstances, materials that are being heated in the lab could catch fire. If a flammable substance in a beaker should catch fire while you are working but the flames are relatively contained, which method must never be used for extinguishing the flame?
c. Use water from the sink nearest the bench to douse the flames.
When should you inspect the glassware in your lab drawer for chips, cracks, or chemical residues?
d. Glassware should be inspected at all of these times to prevent accidents, injuries, or unwanted complications during experimental work.