Lab Safety (copy)

What size of containers should you work with?

Small containers

When should you mix chemicals?

Only when told to

What should you do with labels on chemicals?

Read and reread them

What should you do before you start?

Read instructions all the way through first

How should you mix acid and water?

Add the acid to water

What should you do with coin-top stoppers while pouring?

Hold them between your fingers

Where should you hold your hand when holding bottles?

Over the label

When should you replace stoppers?

Immediately

Where should you work with harmful volatile chemicals?

Under a hood

How should you keep chemicals?

Pure and uncontaminated

How should you draw out chemicals?

With a pipette filler

Where should you heat volatile chemicals?

In a heating mantle or steam bath in a hood

What should you check a gas hose for?

Cracks

Where should the gas hose fit securely?

On the gas valve and bunsen burner

Where should you stand while lighting a bunsen burner?

Back from it

When should you turn off the gas?

If the flame sputters, flares, goes out, or if you smell gas

What should you check glassware for?

Stars or cracks

What should you clamp?

Narrow-necked containers

What should you do while heating test tubes?

Move them back and forth at an angle

What should you not heat?

Closed containers

How should you hold hot glass?

With beaker tongs or hot mitts

What should you not do with a thermometer?

Shake it

Where should you use thermometers?

In a suitable temperature range

How should you lay thermometers down?

On a towel or wire screen away from an edge

What should you use to place glass tubing in a stopper?

An inserter

What kind of clothing should you not wear?

Extremely loose clothing

How should the fabric you wear be?

Sturdy and natural

What length should your pants or skirt be?

Long

What should you remove?

Rings and watches

How should the aisles be in the lab?

Kept clear of personal belongings

What if you have to reach something?

Stand on a step stool

What should be kept outside?

Food and drinks

What should you do to a cut before applying a bandage?

Clean the cut with only water

Where should you rinse chemicals from your hands and arms?

In a sink with only water

How should you extinguish small fires in containers?

By covering them

How should you extinguish a clothing fire?

In a safety shower or with a fire blanket