CHEMISTRY

July 24, 2014

Lab Equipments

1. Test Tubes

13 x 100 mm test tubes

10 x 75 mm test tubes

Ignition tube

Used for chemicals to mix or reaction

2. Test Tube Tong/Holder

A test tube tong/holder is useful for holding a test tube which is too hot to handle.

3. Beaker

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

4. Petri Dish

A petri dish is a shallow glass or plastic cylindrical lidded dish that biologists use to culture cells or bacteria

5. Triple Beam Balance

is used to measure mass

6. 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.

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”

7. Medicine Dropper

8.Spatula

Spatulas are used to dispense solid chemicals from their containers.

Chemicals should never be transferred with your bare hands.

9. Clay Triangle

The clay triangle is used as a support for porcelein crucibles when being heated over a Bunsen burner.

10. Apron• Lab aprons are synthetic rubber coated

and is acid-resistant, alcohol-resistant and has a better oil-resistance than natural rubber.

11. Goggles11. Goggles

• PROTECT YOURPROTECT YOUR

12. Funnel

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

13. Bunsen Burner

Bunsen burners are used for the heating of nonvolatile liquids and solids.

14. Hot plate

• used in laboratory settings to heat glassware

15. 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.

16. Thermometer

• is a device that measures temperature

17. Crucible

Crucibles are used for heating certain solids, particularly metals, to very high temperatures.

18. Ring clamp

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

Ringstands and their Components

19. Utility Clamps

Utility clamps are used to secure test tubes, flasks, etc. to the ring stand

20. Dilution Tray/Spot Plate

• Is used to perform serial dilution

• often used for qualitative analysis. The wells (or spots) are used to perform reactions on a very small amount of materials

21. Mortar and Pestle

To crush solid into powder

Ringstands and their Components

22.Wire Gauze

Wire gauze sits on the iron ring to provide a place to stand a beaker.

On older wire gauze, the white material is asbestos!

23. Evaporating Dish

The evaporating dish is used for the heating of stable solid or liquid compounds and elements.

24. Watch Glass

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

To observe a chemical reaction

25. Crucible Tongs

For handling hot crucibles; also used to pick up other hot objects. NOT to be used for picking up beakers!

26. Test Tube Racks

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

27. Graduated Cylinder

A graduated cylinder is used to measure volumes of liquids.

28. Burette

• is used to dispense known amounts of a liquid reagent in experiments

Ringstands and their Components

29. Burette Clamps

Burette clamps are used to clamp burettes – long graduated tubes used in titration.

30. Ringstands and their Components

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

31. Squirt or Wash Bottle

A wash bottle has a spout that delivers a wash solution to a specific area. Distilled water is the only liquid that should be used in a wash bottle.

32. Test Tube Brushes

Test tube brushes are used to clean test tubes and graduated cylinders.

Forcing a large brush into a small test tube will often break the tube.

33.Forceps

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

34. Gloves34. Gloves

For handling hot objects

35. Pipette

The pipette is used for transfering small amounts of liquid from place to place. They are usually made of plastic and are disposable

36.Scoopula

Scoopula are used to dispense solid chemicals from their containers.

Chemicals should never be transferred with your bare hands.

Conclusion

• Share with your partner– How will identifying common lab equipment

help you in lab experiments? Be specific and provide examples

Safety Project• Overview:

– Cleaning Supplies (Dollar Store)• Kleenex box (unused), dish soap, hand sanitizer,

disinfectant, etc.

• 1 item per partner pair

– https://www.dropbox.com/sh/2r44nqvg5kst3zb/AABjpcBX0l05kcJrnAJzl07ba

– Colored Papers are available– Images (drawn or copied)

Homework

• Sign Course Statement (Fri)

• Lab Safety Project (Fri)– Bring supply to class– Bring pictures or decorations

• Complete Lab Equipment Activity Write Up– Friday

• Equipment Quiz 8 equipment (Monday)