Laboratory Safety Flashcards
(47 cards)
Work with large or small containers?
Small.
When can you mix chemicals?
When your teacher tells you to.
How many times should you read chemical labels?
More than once.
What should you do with instructions before you begin?
Read through them all the way.
When should you use a tray?
Whenever your lab has one.
How should you move when handling chemicals?
Carefully and deliberately.
Do you add acid to water or water to acid?
Add concentrated sulfuric or phosphoric acid to water.
Where should you hold coin-top stoppers while pouring?
Between your fingers.
Where should you hold bottles?
With your hand over the labels.
How fast do you replace stoppers?
Immediately.
Where should you work with harmful volatile chemicals?
Under a hood.
How should you keep chemicals?
Pure and uncontaminated.
Who should you notify to clean up spills?
Your teacher.
Where should you put waste.
In the proper container.
Where should you heat volatile organics? Where should you not.
In a heating mantle or steam bath in a hood. Not over a Bunsen Burner.
What should you check for on the gas hose for before use?
Cracks.
Make sure the hose fits securely on the __
Gas valve and Bunsen burner fittings.
Where should you stand from the burner while lighting?
Stand back.
Should you turn on the gas before or after lighting a match?
After.
What do you do if the flame sputters, flares, or goes out, or if you smell gas?
Turn off the gas.
What should you always check glassware for?
Stars or cracks.
Where should you clamp narrow-necked containers to?
The ring stand.
How should you move test tubes back and forth through a flame while heating?
At and angle.
Should you heat closed containers?
No.
