Why should you not pour unused chemicals back into a bottle?
Never return unused chemicals to the reagent bottles. This is a source of possible contamination of the entire contents of the stock bottle. Dispose of unused chemicals exactly as instructed in the waste disposal instructions for that substance, identified by throughout each experiment.
How can a small contained fire be extinguished most easily?
How can a small contained fire be extinguished most easily? Smother the fire with a small container (i.e., a beaker) Remember this is to extinguish SMALL fires!
What would be used if your clothing caught fire?
If your clothes catch fire, stop, drop, and roll – cool and call. The “stop, drop, roll – cool and call” procedure should be used to extinguish flames and lessen burn injuries if your clothes catch fire.
When should the chemical fume hood be used?
The fume hood is often the primary control device for protecting laboratory workers when working with flammable and/or toxic chemicals.
Why are no unauthorized experiments permitted in the lab?
Why are no unauthorized experiments permitted in the lab? The student lacks experience in the lab and could be harmed.
Why is there no eating or drinking in a lab?
Food ingestion and chemically contaminated drinks are sources of chemical exposure. Thus, chemical exposure takes place upon consuming food or beverages stored with chemicals. Therefore, eating or drinking in the lab is strictly forbidden.
Why is working at a fume hood often preferable to working at a lab bench?
Why should you avoid wearing baggy clothing in the lab? Why is working at a fume hood often preferable to working at a lab bench? The ventilation system pulls fumes and fires away from you and the lab. Which of the following can be prevented by washing your hands after working in the lab?
Who should you call in case of an emergency in the lab?
A lab worker who has sustained a work-related injury that requires emergency treatment should go directly to the hospital emergency room. A supervisor or colleague may summon assistance by calling 911.
What do you have to do before leaving the lab to make sure you don’t carry traces of chemicals?
Make sure to clean all used glassware, return reagents to the storage area, dispose waste in the right containers and clean your workbench. Always wash your hands to make sure you don’t carry any traces of chemicals with you.