What do you do if a fire erupts in the lab?
In case of lab fire or explosion, ensure your safety first and call emergency responders immediately for help. If possible, shut down the electric power before evacuating the area. Use a wet towel to cover mouth and nose as protection against heavy smoke. Pull fire alarms and evacuate the building safely.
Do you return all unused chemicals to their original containers?
7. Never return unused chemicals to the reagent bottles. This is a source of possible contamination of the entire contents of the stock bottle.
When gathering glassware and equipment for a lab you should?
When gathering glassware and equipment for an experiment, you should… Read all directions carefully to know what equipment is necessary. Examine all glassware to check for chips or cracks. Clean any glassware that looks dirty.
How should Rick correct his technique?
Panel 2 How should Rick correct his technique? Rick should use the wafting technique—use his hand to direct fumes from a chemical toward his nose—rather than inhaling directly.
What are the 3 most common ways accidents or incidents occur in the laboratory?
7 Common Lab Accidents (And How to Avoid Them)
- Fire. It’s all fun and games until someone ignores the Bunsen burner!
- Heat Burns. Handling hot items hastily without the proper tools can result in serious burns.
- Chemical Burns.
- Cuts and Scrapes.
- Contamination.
- Inhalation.
- Spills and Breaks.
Do you shake laboratory thermometers down before use?
Do not “shake down” thermometers or use it as a stirring rod. Thermometers break easily. You must ask for help in cleaning up broken thermometers in order to prevent mercury contamination in the lab.
Do you have to wear an apron in the lab?
Wear protective clothing that resists physical and chemical hazards when exposure may occur. Lab coats are appropriate for minor chemical splashes and solids contamination, while plastic or rubber aprons are best for protection from corrosive or irritating liquids.
How should you smell a substance in lab?
When you are in the laboratory and take a direct sniff of the chemicals you are using, you run the risk of damaging your mucous membranes or your lungs. When it is necessary to smell chemicals in the lab, the proper technique is to cup your hand above the container and waft the air toward your face.
When you are smelling a chemical you should?
Do not touch, eat, or smell any chemical unless instructed to do so. When instructed to smell a chemical, you need to fan the air above the chemical toward your nose. Do not sniff the chemical directly by bringing it close to your nose. If you do so, the odor may badly irritate your nasal passage.
What is the first aid for laboratory accident?
Wear clean gloves. Cover area with gauze (or clean paper towels). Apply pressure to bleeding area — have person sit or lie down. If wound is large or person is dizzy or weak, call 911 to transport person to SHS or Emergency Room.
What is the general rule about shaking laboratory thermometers?
* No, do NOT shake the lab thermometers. They do not need to be shaken, and you might break them.
Why should you hold a bottle with your hand over the label?
When pouring liquid reagents from bottles, hold the bottle with the label against the palm of your hand so that the liquid is poured from the side opposite the label (if any liquid runs down the outside of the label, immediately wipe off the liquid).
Why should Rings be removed before a lab?
Finger rings or other tight jewelry which is not easily removed should be avoided because of the danger of corrosive or irritating liquids getting underneath the piece and producing irritation.
What device is always turned off as we leave the lab?
Be sure that all gas valves are turned off and that all hot plates are turned off and unplugged when you leave the lab. 12. Be careful with hot plates, Bunsen burners, and other heat sources. Keep your body and clothing away from flames.
Why is it important to commit when pouring a liquid?
He says you must commit to pouring in order to break the surface tension of the solution. Without it, chemicals often drip down the sides of the containers.
What are the safety precautions to be taken when using laboratory equipment?
run for the fire extinguisher. throw water on the fire. open the windows. to avoid eye strain. to improve your vision. only if you don’t have corrective glasses. any time chemicals, heat or glassware are used. Q. If you wear contact lenses in the school laboratory,
When to notify your instructor if a laboratory fire erupts?
an open flame If a laboratory fire erupts, immediately? notify your instructor. When are eye protection devices (such as goggles) worn in the laboratory? any time chemicals, heat or glassware are used. If you wear contact lenses in the school laboratory?
What should you never do in a laboratory?
Never remove chemicals or other equipment from the laboratory. Q. Chipped or cracked glassware is okay to use. Q. All unauthorized experiments are prohibited. Q. Laboratory aprons should be worn during all lab activities. Q. You are allowed to enter the chemical preparation/storage area any time you need to get an item Q.
What should you Q first when doing a lab experiment?
If a lab experiment is not completed, you should Q. You are heating a substance in a test tube. Always point the open end of the tube Q. You are heating a piece of glass and now want to pick it up. You should Q. You have been injured in the laboratory (cut, burn, etc.). First you should Q.