What should you do when working with a volatile chemical?
Work in your student hood whenever possible, especially when you are handling volatile chemicals. If you need to carry volatile chemicals through the lab, carry them in a covered container. Everyone in the lab must work together to reduce the amount of volatile chemicals released into the lab room!
What do you use to draw liquid into a pipette?
Pipette-aides or pipettors are suction devices that are used to either suck liquids into or expel liquids out of pipettes. For some types of measurements it may be necessary to expel, or blow-out, the total liquid volume from the pipette using the pipette-aid.
When working with acids Do you always add?
After measuring out your concentrated acid and water, the acid must always be added to the water. This is because when the two mix, heat is generated – this is called the “Enthalpy of solution” or “enthalpy of dissolution”.
What is generally the best approach when liquid from a large reagent?
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.
How do you handle volatile solvents?
When handling solvents, the following precautions should be carried out:
- Store solvents in strong, sealed containers.
- Clearly identify and labels the containers.
- Establish procedures and evacuation routes in case of a fire or a solvent spill.
- Wear protective clothing.
- Use a respirator.
What safety controls should you use when working with a volatile liquid?
Always minimize your exposure to volatile chemicals by using engineering controls such as a fume hood or local exhaust ventilation. If those methods are not sufficient to protect you, be sure to use an approved respirator.
When working with chemicals and burners do you always wear?
1. To protect yourself from possible injury, always wear safety goggles whenever you are working with chemicals, burners, or any substance that might get in your eyes.
What is the most appropriate action if a chemical has just splashed on a person’s face in lab?
What is the most appropriate action if a chemical has just splashed on a person’s face in lab? Wash face without removing goggles if the eyes are not yet affected. Indicate inappropriate attire for a laboratory setting.
When working with acids and bases protection should always be worn?
Safety glasses are to be worn whenever working with acids, bases, or any flammable materials. Let the instructor know immediately about any glassware breakage or chemical spills that may occur so that proper cleanup procedures can be instituted. Use pipet fillers whenever pipeting any fluid.
Do you add acid to base or base to acid?
If a base is added to an acidic solution, the solution becomes less acidic and moves toward the middle of the pH scale. This is called neutralizing the acid. If an acid is added to a basic solution, the solution becomes less basic and moves toward the middle of the pH scale. This is called neutralizing the base.
What personal protective equipment you should be wearing before you handle a chemical like methanol?
Due to its toxicity, methanol is always handled while wearing nitrile gloves, as well as a lab coat and safety goggles. Gloves are changed as soon as they are contaminated.
What are volatile organic compounds?
Volatile organic compounds (VOCs) are emitted as gases from certain solids or liquids. VOCs include a variety of chemicals, some of which may have short- and long-term adverse health effects.
Can volatile toxic chemicals be used in a type A2 BSc?
Minute quantities of volatile toxic chemicals or radionuclides can be used in the Type A2 BSC if it is exhausted to the outside via a canopy connection. Type A2 cabinets are similar to Type A1 cabinets but have two notable differences.
What are VOCs in indoor air quality?
For indoor air quality, ALL organic chemical compounds whose compositions give them the potential to evaporate under normal atmospheric conditions are considered VOCs and should be considered in any assessment of indoor air quality impacts. An organic compound is any of a large class of chemical compounds whose molecules contain carbon.
How do I prevent recirculation of volatile chemicals?
Volatile chemicals should be handled in the direct exhaust (rear) portion of the cabinet to prevent recirculation. Approximately 30% of outgoing air is recirculated as HEPA filtered downflow air.