Types of Burette:
There are three types of burette:
VOLUMETRIC BURETTE
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A volumetric burette is made of glass or plastic material, with a
volume scale printed on the burette wall. It has a stopcock at the
end of the instrument and a valve to control the flow of liquid.
The barrel of a stopcock is made of glass or plastic. Burettes are
usually fixed with a clamp in an iron stand. Normally, volumetric burette
can be classified as:
On a liquid burette, it
has a long graduated
glass tube with a
stopcock at the bottom
to control the flow of
liquid. Gravity causes
fluid to flow when the
valve is opened. The
exact amount of liquid
can be determined by
reading the volume
marked on the glass
tube.
In a gas burette, the stopcock is given at the upper side of the burette.
The tube of the burette is filled with a fluid, such as water, mercury or
other kinds of liquid and is attached to a reservoir of fluid at the bottom
of the tube. The gas is collected by displacing the fluid from the burette
and the volume of the gas is measured by the volume of the displaced
fluid.
Liquid burette
Gas burette
a.
b.
