Laboratory Safety - Glassware, Handling Reagents, Waste Disposal, and Data Handling Flashcards
How do you store your graduated cylinders?
Horizontally in your drawer
How should you not store your glassware?
Do not place beakers inside each other and burets should not be placed on the counter top but only clamped on the buret stands
What do you do with glassware that is dirty with a dilute solution?
Rinse the glassware once with tap water, then with four minimal portion of deionized water
Where should glassware be dry?
Only on the outside
What should you do with rubber stoppers?
Lubricate the holes with glycerol before inserting fire polished glass tubing or thermometers
What is fire polishing?
Glassware is fire polished by holding the ends of the tubing in the burner flame until the glass edges have become rounded
How careful should you be with reagents?
As careful as possible to avoid any possibility of contamination
What should you not put into reagent bottles?
Unused or excess chemicals back into the bottles, pipets, spatulas, wooden sticks, droppers, etc
How should solids be discarded?
In the designated solid waste container
How should water-soluble compounds be discarded?
They may be washed down the drains with lots of water
What should not be thrown into the sinks?
Non-water soluble solids, like litmus paper or boiling stones
How should solutions with strong odors be discarded?
Should be poured into the sink under the exhaust hoods and flushed with large amounts of water
What is primary data?
The measurements, readings, and observations made during an experiment
How should primary data be recorded?
Directly on experiment sheets, at the time that the measurement or observation is made, and in permanent (non-erasable) waterproof ink
What is secondary data?
It is information that can be recorded without requiring measurement or observations.
