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Lab 2 Instruments Used in the Lab and Their Uses

Lab 2 Instruments Used in the Lab and Their Uses. Used to measure large volumes of liquid 10mL – 2000mL. Erlenmeyer Flask. Other kinds of flasks. Florence Flask. Volumetric Flask. Other kinds of flasks. The round bottom flask is used as: reaction flask distilling flask

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Lab 2 Instruments Used in the Lab and Their Uses

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  1. Lab 2Instruments Used in the Lab and Their Uses

  2. Used to measure large volumes of liquid 10mL – 2000mL Erlenmeyer Flask

  3. Other kinds of flasks Florence Flask Volumetric Flask

  4. Other kinds of flasks • The round bottom flask is used as: • reaction flask • distilling flask • collection flask

  5. Reading an Erlenmeyer Flask

  6. Beaker & Beaker Tongs • A general purpose item of glassware • Used to measure volume of liquid • 50 mL – 2000 mL

  7. Beaker & Beaker Tongs • Used to handle hot beakers • Do not work well for very small beakers or very large beakers

  8. Reading a Beaker

  9. Graduated Cylinders

  10. Volume of LiquidsReading a Meniscus

  11. Parafilm • Flexible, thermoplastic, rolled, waterproof sheet interwound with paper to prevent adhering. • Adheres quickly and firmly to itself, covering culture tube or flask mouths and sealing petri dish edges.

  12. Plastic Pipettes • Disposable

  13. Graduated Pipettes

  14. Graduated Pipettes

  15. Has a single graduation that allows it to deliver one specific volumeaccurately. There are many different sizes of volumetric pipets (1-, 5-, 10-, 25-, 50- and100-ml volumetric pipets are common). Volumetric Pipette

  16. Pipet Fillers

  17. Thermometers • The current thermometers range from -20° to 150°C. • They are filled with a red liquid for easy reading

  18. Digital Thermometers These thermometers give the temperature reading with a digital readout.

  19. Test Tubes • Used for holding small amounts of liquids and solids • Sometimes reactions are done in test tubes

  20. Culture Tubes • Screw cap test tube • Snap on lids

  21. Test Tube Racks • Test tube racks come in many styles

  22. Test Tube Holder • Test tube holder is the holder made out of wire • This small piece of equipment does nothing except hold test tubes • The holder is used to hold test tubes when they are hot and untouchable.

  23. Funnels • Three types of filtering funnels used in chemistry labs. From left to right: Buchner funnel and the grey rubber adaptor for it, stemmed funnel, and stemless funnel.

  24. Filter Paper

  25. Watch Glass • Watch glasses are small, flat, round pieces of glassware. • They are mainly used to dry and weigh solid compounds and to cover containers

  26. Ring Stand and Iron Ring • Iron rings attach to a ring stand • Have several uses

  27. Ring Stand Wire Guaze Iron Ring Striker Bunsen Burner

  28. Wire Mesh (guaze) • Gauzes are the square-shaped pieces of mesh or screen • When placed on top of a ring, they are good, flat supports for Erlenmeyer flasks and beakers in a variety of situations.

  29. Bunsen Burner • common piece of laboratory equipment used for heating, sterilization, and combustion. • safely burns a continuous stream of a flammable gas such as natural gas

  30. Striker • The striker has an advantage that it's longer than a match (avoid burning your fingers), and produces sparks, as opposed to an open flame, to light the burner.

  31. Crucible & Crucible Tongs

  32. Clay Triangle • The triangle is used to hold crucibles when they are being heated. • They usually sit on a ring stand

  33. Evaporating Dish • used to heat and evaporate liquids.

  34. Spot Plate

  35. Mortar and Pestle Used to crush solids into powders for experiments, usually to better dissolve the solids.

  36. Glass Stir Rods • Stir rods are long cylinders made of glass. • They come in many sizes

  37. Clamps • Connect to a ring stand at one end and to glassware at the other end. • They are designed for clamping cylindrical shaped objects.

  38. Buret & Buret Clamp • Very specialized piece of glassware used to accurately measure the volume of liquid that is dispensed.

  39. Forceps (“tweezers”) • Forceps are used for any situation where you have to grab a small item and cannot do it with your fingers

  40. Spatulas come in many sizes and shapes Spatulas are used for transferring solids Spatulas Scoopula

  41. Dissecting tools • Needle • Scalpel

  42. 2 Pan Balance

  43. Multi Beam Balance

  44. Accurate to .01 grams Usually used to weigh solids Have 2 different kinds Electronic Balance

  45. Analytical Balance Accurate to 0.001 grams

  46. Weighing Containers

  47. Hot Plates

  48. Stir Bars • A spin bar, or stir bar, long white Teflon-covered magnet. • These bars have only one purpose: to stir solutions

  49. Meter Stick

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