Table of Contents
8. 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).
Where should you place your hand when pouring from bottles?
Where should you hold the chemical bottles? You should hold it where your hand is covering the label.
What steps should you take when pouring liquids from a reagent bottle?
Carefully pour the amount of reagent that you will need, not extra, into the beaker and then close the reagent bottle. Graduated cylinders are unstable so transfer liquids into the labeled beaker first and then pour from the beaker into your graduated cylinder.
When pouring from a bottle the label on the bottle should?
When pouring from bottles, the label should always face upward to prevent any spillage from destroying the label.
What is generally the best approach when liquid from a large reagent bottle is needed in an experiment select one?
What is generally the best approach when liquid from a large reagent bottle is needed in an experiment? check and see if anyone else can use the chemical. If not, discard in the proper waste container.
Should you hold bottles with your hand over the label while pouring?
Hold bottles with your hand over the label. Replace stoppers immediately. Keep chemicals away from your face. Work with harmful volatile chemicals under a hood.
When pouring chemicals you must always?
Always wear chemical splash goggles for eye protection when working with chemicals. When pouring large quantities of hazardous chemicals, in addition to goggles, wear a face shield large enough to protect your ears and neck as well as your face. Always wear gloves when handling chemicals.
What should you do after finishing work with a reagent bottle?
What should you do after finishing work with a reagent bottle? Return the bottle to its proper storage location. Close the bottle. Which steps are necessary for cleaning a spill involving broken glass?.
How do you remove solid chemicals from a reagent bottle?
Never put your spatula to remove solid chemicals from a bottle. If you do so, you will be contaminating the chemical. Instead, pour solid directly into your container by tilting the bottle and rotating it to control the amount dispensed.
When handling the stopper taken out of a reagent bottle one should?
How should a stopper be handled after it has been removed from a reagent bottle? It should be held, until you can return it to the bottle. the curved surface at the top of a column of liquid.
How do you handle chemicals in a lab?
Always keep in mind the general guidelines while handling the chemicals: Always label all containers with chemicals. Use protective equipments for eye protection and make sure to wear a laboratory coat. Avoid intentional smelling, inhaling and tasting of chemicals.
What are the 10 lab safety rules?
The 10 Most Important Lab Safety Rules of 10. The Most Important Lab Safety Rule. of 10. Know the Location of Safety Equipment. of 10. Dress for the Lab. of 10. Don’t Eat or Drink in the Laboratory. of 10. Don’t Taste or Sniff Chemicals. of 10. Don’t Play Mad Scientist in the Laboratory. of 10. Dispose of Lab Waste Properly. of 10.
What are the 10 steps to chemical safety?
General Chemical Safety Guidelines Maintain an organized and orderly facility. Communicate hazards to everyone in the facility. Follow basic safety procedures. Use engineering controls. Use PPE as needed or required. Follow requirements for high hazard chemicals. Prepare for accidents and emergencies.
Why do you never take a reagent bottle back to your work area?
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 do you dispense a required amount of reagent?
To dispense a required amount of reagent: A) bring reagent bottle to your bench, and return it immediately after you are done. B) take your container to the reagent bench. C) move reagent bottle to a designated area for dispensing. D) ask the instructor to dispense it for you.
When you open a reagent bottle Why should the cover of the reagent bottle not be laid on the table?
17. Do not lay down the stopper of bottle. Impurities may be picked up and thus contaminate the solution when the stopper is returned. 18.
Should you shake down a lab thermometer?
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.
What to do if hair catches on fire in lab?
If anyone’s hair or clothing catches on fire, immediately try to smother the flames with a wool fireblanket, or cotton clothing. Do not ever try to smother flames with nylon clothing: it could melt onto the skin.
Do you need to shake down a lab thermometer?
Do you need to shake down the lab thermometers? * No, do NOT shake the lab thermometers. They do not need to be shaken, and you might break them.
Why is it important to commit when pouring a liquid?
If you are tentative, the liquid runs down the side of the vessel from which you are pouring and dribbles all over the place. But if you “commit to the pour” and tilt the glass over further, with confidence, the liquid pours into the other glass with no spilling.
What size container should you use when pouring chemicals?
What does the video say about the size of the container that you should use in pouring? Use small (compatible sized) containers when pouring. Larger containers can be more difficult to use and can cause spills.
How many times should you read the label information before you open the container?
How many times should you read the labels information before you open the container? Three times.
How do you handle a laboratory emergency?
Major Alert people in area to evacuate. Activate nearest fire alarm or call Security number. Close doors to confine fire. Evacuate to safe area or exit building through stairwell; do not use lift. Have person knowledgeable of incident and laboratory assist emergency personnel.
Where can I dispose of titrant solution?
Discard the chemical down the sink under running water. Check and see if anyone else can use the chemical. If not, discard in the proper waste container.
What should you do every time before you leave the lab Labflow?
What should you do every time before you leave the lab? Select one or more: Wash your hands.
