Lab 2 Instruments Used in the Lab and Their Uses

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Lab 2Instruments Used in the Lab and Their Uses
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Erlenmeyer Flask

• Used to measure large volumes of liquid
• 10mL 2000mL

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Other kinds of flasks
Florence Flask
Volumetric Flask
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Other kinds of flasks

• The round bottom flask is used as
• reaction flask
• distilling flask
• collection flask

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Reading an Erlenmeyer Flask
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Beaker Beaker Tongs

• A general purpose item of glassware
• Used to measure volume of liquid
• 50 mL 2000 mL

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Beaker Beaker Tongs

• Used to handle hot beakers
• Do not work well for very small beakers or very
  large beakers

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Reading a Beaker
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Graduated Cylinders
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Volume of LiquidsReading a Meniscus
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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.

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Plastic Pipettes

• Disposable

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Graduated Pipettes
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Graduated Pipettes
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Volumetric Pipette

• 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).

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Pipet Fillers
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Thermometers

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

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Digital Thermometers

• These thermometers give
• the temperature reading with
• a digital readout.

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Test Tubes

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

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Culture Tubes

• Screw cap test tube
• Snap on lids

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Test Tube Racks

• Test tube racks come in many styles

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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.

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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.

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Filter Paper
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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

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Ring Stand and Iron Ring

• Iron rings attach to a ring stand
• Have several uses

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Ring Stand
Wire Guaze
Iron Ring
Striker
Bunsen Burner
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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.

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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

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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.

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Crucible Crucible Tongs
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Clay Triangle

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

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Evaporating Dish

• used to heat and evaporate liquids.

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Spot Plate
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Mortar and Pestle

• Used to crush solids into powders for
  experiments, usually to better dissolve the
  solids.

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Glass Stir Rods

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

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Clamps

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

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Buret Buret Clamp

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

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Forceps (tweezers)

• Forceps are used for any situation where you have
  to grab a small item and cannot do it with your
  fingers

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Spatulas

• Spatulas come in many sizes and shapes
• Spatulas are used for transferring solids

Scoopula
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Dissecting tools

• Needle
• Scalpel

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2 Pan Balance
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Multi Beam Balance
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Electronic Balance

• Accurate to .01 grams
• Usually used to weigh solids
• Have 2 different kinds

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Analytical Balance

• Accurate to 0.001 grams

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Weighing Containers
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Hot Plates
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Stir Bars

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

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Meter Stick
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Caliper
Vernier caliper is a convenient tool to use when
measuring the length of an object, the outer
diameter (OD) of a round or cylindrical object,
the inner diameter (ID) of a pipe, and the depth
of a hole. The measurement is estimated to the
hundredths position.
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Meter Stick and Ruler

• A meter stick is 39 or 100 cm long
• We will use rulers that are 12 or 6

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Protractor for Measuring Angles
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Stopwatches
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Stoppers

• Stoppers come in many different sizes.
• May or may not have holes for thermometers

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Water Bottles
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Microscopes