COMMON LABORATORY EQUIPMENT

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COMMON LABORATORY EQUIPMENT
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FLASKS, BEAKERS, CYLINDERS
Erlenmeyer flask
beaker
Erlenmeyer flasks and beakers are used for
mixing, transporting, and reacting, but not for
accurate measurements. The volumes stamped on the
sides are approximate and accurate to within
about 5.
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FLASKS, BEAKERS, CYLINDERS
Graduaded cylinder
Read at the meniscus
Graduated cylinders are useful for measuring
liquid volumes to within about 1. They are for
general purpose use, but not for quantitative
analysis. If greater accuracy is needed, use a
pipet or volumetric flask.
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Volumetrics flasks
A volumetric flask is used to make up a solution
of fixed volume very accurately.
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BURET
A buret is used to deliver solution in
precisely-measured, variable volumes. Burets are
used primarily for titration, to deliver one
reactant until the precise end point of the
reaction is reached.
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USING A BURET
Deliver solution to the titration flask by
turning the stopcock.
To fill a buret, close the stopcock at the bottom
and use a funnel.
Read the bottom of the meniscus. Be sure your eye
is at the level of meniscus, not above or below.
Check the tip of the buret for air bubble. Remove
air bubble. If an air bubble is present during a
titration, volume readings may be in error.
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PIPETS
Rubber pipet filler
Bulb pipets
A pipet is used to measure small amounts of
solution very accurately.
Pipet rack
Graduated pipets
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AUTOMATICS PIPETS
An automatic pipet is used to deliver solution in
precisely-measured, variable volumes
Disposable pipette tips
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DIVERSES
Petri dish glass
Cuvettes spectrophotometric cells
Test tubes
dessicator
Oven
vials
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DIVERSES
Lab coat
Fire blanket
extinguisher
Safety goggles
Fume hood