Materials

• Pen/Pencil• Binder

Thursday 10/8/15

Warm-Up

Solve the following according to sig figs:1) 24.67 in + 8.7 in + 3.911 in

2) 902.4 cm2 / (345 cm + 21 cm)

3) 400. m / 2.467 s

Thursday 10/8/15

37.3 in

2.47 cm

162 m/s

Learning Targets

I Can… Identify common laboratory equipment Describe the function of common

laboratory equipment

Thursday 10/8/15

Lab Equipment

Thursday 10/8/15

Beaker

Beakers hold solids or liquids that will not release gases when reacted or are unlikely to splatter if stirred or heated.

Erlenmeyer Flask

Erlenmeyer flasks hold solids or liquids that may release gases during a reaction or that are likely to splatter if stirred or heated.

Graduated Cylinder

A graduated cylinder is used to measure volumes of liquids.

How to Read the Graduated Cylinder

Reading the graduated cylinder is easy if you know what you are looking for. The measurement is found by looking at the bottom of the meniscus.

What’s the meniscus you ask? It is….

The curve in the upper surface of a liquid close to the surface of the container, it is caused by surface tension.

How to Read the Graduated Cylinder

When reading the graduated cylinder, you must get at eye level with the meniscus, so you are not looking up or down on an angle. The measurement is found by reading the number at the BOTTOM of the meniscus.

Test Tubes13 x 100 mm test tubes

10 x 75 mm test tubes

Ignitiontube

Used to hold substances or perform reactions.

Test Tube Racks

Test tube racks are for holding and organizing test tubes on the laboratory counter.

Rubber Stoppers

Rubber stoppers are used to close containers to avoid spillage or contamination.Containers should never be heated when there is a stopper in place. Why?

Meter Stick

Meter sticks are used to measure distance in millimeters (mm), centimeters (cm), and meters (m).

How to Read a Meter Stick

Yes, many of you already know how to use a meterstick, but there are a few things you need to keep in mind:

1) Always start at the “0” mark.

2) The number of significant digits comes from the number of tick marks on the meterstick or ruler.

How to Read a Meter StickThe Guessing Digit

Electronic Balance

Electronic balances are used to measure the mass of an object in grams (g).

Thermometer

Thermometers are used to measure the temperature of a substance in Celsius (°C).

Watch Glass

A watch glass is used to hold a small amount of solid, such as the product of a reaction.

Medicine Dropper or Pipette

A medicine dropper is used to transfer a small volume of liquid (less than one mL).

On top of each medicine dropper is a “rubber bulb”

Forceps

Forceps (or tweezers) are used to pick up small objects.

Funnel

A funnel is used to aid in the transfer of liquid from one vessel to another.

Spatulas

Spatulas are used to dispense solid chemicals from their containers. Chemicals should never be transferred with your bare hands.

Scoopulas

Scoopulas are used to transfer solids.

Scoopulas are larger than spatulas.

Ring Stands and their Components

Ringstands are a safe and convenient way to perform reactions that require heating using fire.

Ring Stands and their ComponentsIron Rings

Iron rings connect to a ring stand and provide a stable, elevated platform for the reaction.

Ring Stands and their Components

Test Tube Clamp

Test tube clamps are used to secure test tubes to the ring stand.

Wrapping up

Can you… Identify common laboratory equipment Describe the function of common

laboratory equipment

Thursday 10/8/15

Homework:

• Laboratory Worksheets (2 pages)