Equipment for the
Chemistry Lab
Ms. Towle
Accurate Measurements
These pieces of equipment provide
accurate measurements when read
properly.
How to read a graduated cylinder
Your eye line should be even with
the BOTTOM of the meniscus
(curved surface of a liquid).
How to use a triple beam balance
Always carry the balance with two hands
Set all the riders to zero and remove any
material from the balance pan.
Calibrate the balance by turning the
adjustment screw until the pointer on the end
of the beam aligns with the center mark.
Only solids should be placed directly on the
pan. Loose solids should be placed in a weigh
boat or weigh paper and liquids should be
placed in a container.
How to use a triple beam balance
Move the largest rider along the beam
one notch at a time until the pointer
drops. Ten move the rider back on
notch. Repeat this procedure with the
next smallest rider. Continue in the
same manner until you are using the
smallest rider.
How to use a triple beam balance
The beam on which the smallest rider
moves does not have any notches.
Slowly slide the rider along until the
pointer on the end of the beam aligns
with the center mark.
The mass of the object on the pan is the
sum of the masses shown on the beams.
E sure to subtract the mass of the
container, if any.
How to use a triple beam balance
Approximate Measurements
These pieces of equipment do not
provide accurate measurements but
can be used for approximate
measurements.
Other Equipment
Other Equipment
Other Equipment
Other equipment
Safety Equipment
These should be worn to protect
yourself from potential injuries.
Equipment used for heating
How to use a bunsen burner
Check the rubber tubing for any cracks.
Push the end of the rubber tubing onto
the gas valve.
Make sure the burner is level and on a
flat surface and away from any
flammable material.
Close the air intake valve.
How to use the bunsen burner
Light a match and hold it against the
lower side of the burner tube. Turn on
the gas slowly and move the match up
until the gas ignites.
Adjust the flame by manipulating the
air intake control a good burner flame
gives off little light and has two distinct
cones.
How to adjust the flame on a bunsen
burner
If the flame is:
Too large, slowly turn down the gas.
Yellow and/or smoky, adjust the air intake
control.
Disappears down the tube, turn off the gas
with the valve, decrease the air intake, and
relight the burner.
If there is a gap between the top of the tube
and the base of the flame, slowly turn down
the gas.