An Erlenmeyer Flask is a coneshaped container with neck, so
you can hold the flask or attach a
clamp or use a stopper. They are
used to measure, mix, and store
liquids. The shape makes this flask
very stable. They are one of the
most common and useful pieces of
chemistry lab glassware. Most
Erlenmeyer flasks are made of
borosilicate glass so that they can
be heated over a flame or
autoclaved. The most common
sizes of Erlenmeyer flasks
probably are 250 ml and 500 ml.
They can be found in 50, 125, 250,
500, 1000 ml. You can seal them
with a cork or stopper or place
plastic or paraffin film or a watch
glass on top of them.
Beaker
No lab would be complete
without beakers. Beakers are
used for routine measuring
and mixing in the lab. They
are used to measure volumes
to within 10% accuracy. Most
beakers are made from
borosilicate glass, though
other materials may be used.
The flat bottom and spout
allow this piece of glassware
to be stable on the lab bench
or hot plate, plus it's easy to
pour a liquid without making
a mess. Beakers are also easy
to clean.
Crucible
A crucible is a cup-shaped
piece of laboratory
glassware that is used to
hold samples which are to
be heated to high
temperatures. Many
crucibles come with lids.
Funnel
A funnel is a conical piece of glassware that
terminates in a narrow tube. It is used to
transfer substances into containers that have
narrow mouths. Funnels may be made of any
material. A graduated funnel may be called a
conical measure.
Graduated Cylinders
Graduated cylinders are
used to measure volumes
accurately. The can be
used to calculate the
density of an object if its
mass is known. Graduated
cylinders usually are
made from borosilicate
glass, though there are
plastic cylinders, too.
Common sizes are 10, 25,
50, 100, 250, 500, 1000 ml.
Choose a cylinder such
that the volume to be
measured will be in the
upper half of the
container. This minimizes
measurement error.
Petri Dish
Petri dishes come as a set,
with a flat bottom dish and
a flat lid that rests loosely
over the bottom. The
contents of the dish are
exposed to air and light,
but the air is exchanged by
diffusion, preventing
contamination of the
contents by microorganisms.
Petri dishes that are
intended to be autoclaved
are made from a
borosilicate glass, such as
Pyrex or Kimax. Single-use
sterile or non-sterile plastic
petri dishes also are
available. Petri dishes
commonly are used for
culturing bacteria in a
microbiology lab,
containing small living
specimens, and holding
chemical samples.
Pipette
Pipettes are used to
measure and transfer
small volumes. There are
many different types of
pipettes. Examples of
pipette types include
disposable, reusable,
autoclavable, and
manual.
They are calibrated to
deliver a specific
volume. Some pipettes
are marked like
graduated cylinders.
Other pipettes are filled
to a line to reliably
deliver one volume
again and again. Pipettes
may be made of glass or
plastic.
Test Tube and Rack
Test tubes are roundbottom cylinders,
usually made of
borosilicate glass so that
they can withstand
temperature changes
and resist reaction with
chemicals. In some cases,
test tubes are made from
plastic. Test tubes come
in several sizes. The
most common size is
smaller than the test tube
shown in this photo
(18x150mm is a standard
lab test tube size).
Sometimes test tubes are
called culture tubes. A
culture tube is a test tube
without a lip.
Volumetric Flask
Volumetric flasks are
used to accurately
prepare solutions for
chemistry. This piece
of glassware is
characterized by a
long neck with a line
for measuring a
specified volume.
Volumetric flasks
usually are made of
borosilicate glass.
They may have flat or
round bottoms
(usually flat). Typical
sizes are 25, 50, 100,
250, 500, 1000 ml.
Watch Glass
Watch glasses are
concave dishes that
have a variety of uses.
They can serve as lids
for flasks and beakers.
Watch glasses are nice
for holding small
samples for
observation under a
low-power microscope.
Watch glasses are used
for evaporating liquid
off of samples, such as
growing seed crystals.
They can be used for
making lenses of ice or
other liquids. Fill two
watch glasses with
liquid, freeze the
liquid, remove the
frozen material, press
the flat sides together...
lens!
Tongs
1 ) Beaker
Tongs are best used
for holding or moving a hot beaker. The
jaws are usually covered with plastic so
beakers may be firmly held under the
rim while pouring contents.
2) Crucible Tongs pick up crucibles, test
tubes, flasks, beakers, etc. They feature rustproof,
1/4″ nickel-plated steel wire with riveted joints and
accurately aligned corrugated tips. Long handles
give an added measure of safety when reaching
into ovens or fume hoods, or when handling hot
liquids.
Ring Stand &
Supports/Clamps
A ring stand will
conveniently heat
beakers, flasks, test
tubes, and other
glassware over a burner,
or set up physics
apparatus such as
moveable pulleys and
inclined planes.
A ring support attaches
to the stand to support
other equipment.
The burette clamp holds
burettes and test tubes.
Wire Gauze
and
Clay Triangle
Wire gauze rests on the
ring to support
glassware above an
alcohol burner. The
triangle rests on the ring
to support funnels,
crucibles and
evaporating dishes.
Bunsen Burner
A Bunsen burner is a
common piece of
laboratory equipment
that produces a single
open gas flame, which
is used for heating,
sterilization, and
combustion.
Mortar and Pestle
A mortar and pestle is a
tool used to crush, grind,
and mix substances. The
pestle is a heavy stick
whose end is used for
pounding and grinding,
and the mortar is a bowl.
The substance is ground
between the pestle and
the mortar.
Well Plate
This is a flat plate with
multiple “wells” used
as small test tubes. In
chemistry used for
mixing small amount
of reagents for
chemical reactions.
Fume Hoods
Fume hoods protect laboratory workers
from fumes and potentially dangerous
chemical reactions by continuously
vaccuming air out of the lab and by
providing a glass shield. Experiments can
be clearly seen by the user, yet the user is
protected from splatter and harmful
fumes.
Pipettes
Pipettes are devices that allow the users to
extract or deliver small amounts of a
liquid. Pipettes come in a variety of
designs with only two shown. Some are
graduated to deliver exact quantities, but
most allow for a "drop at a time" delivery.
Resources
http://chemistry.about.com/od/chemistrylabexperiments/i
g/Chemistry-Laboratory-Glassware/Erlenmeyer-Flask.17L.htm
http://wardsci.com/