Working with ChemicalsSafely

Laboratory Equipment

Forceps

Test tube holder

Glass stirring rod

Beaker tongs

Crucible tongs

Test tubes

Wire gauze

Ring

Ring stand

Bunsen burner

Lab Equipment

Beaker Erlenmeyer flask

Funnel

Scoopula Spatula 24-well plate

Measuring LiquidsBeakers and

flasks are good for measuring approximate volumes of liquids but have a margin of error of ±5%

For more accurate measuring, use a graduated cylinder. ◦ Liquids form a

meniscus (curved surface) in graduated cylinders. Read the volume at the bottom of the meniscus.

Reading a meniscusNever pick up the graduated

cylinder, leave it on the table and bend down to be at eye level with the liquid.

Read from the bottom of the meniscus!A.

B.

C.D.

Transferring LiquidsTo prevent

splashing when pouring a liquid into an open container:◦ Place a stirring

rod in the container & pour the liquid down the rod

To pour into a small-mouthed container (like a test tube):◦ Pour the liquid

into a beaker 1st.◦ Then pour from

beaker into smaller container using the spout of the beaker

Transferring SolidsTo a large-mouth

container: use a spoon, spatula, or a scoopula to collect & transfer the solid

To a small-mouth container: 1st crease a piece of paper in half, place the solid in the crease and pour into the container.

More safe proceduresNever use a thermometer to stir

a solution! You could break the thermometer.

Always wear goggles over your eyes!

More safety proceduresNo playing in the lab!

No eating or drinking in the lab!

Follow directions and pay attention!