chemistry july 24, 2014. lab equipments 1. test tubes 13 x 100 mm test tubes 10 x 75 mm test tubes...
TRANSCRIPT
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
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
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.
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.
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)