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-13-
Measuring the Density of a Liquid
Measure the density of a liquid by the following procedure:
(1) Press the RE-ZERO key with the float
hanging.
(2) Pour the liquid whose density is to be
measured into the beaker.
Adjust the amount of the liquid so that the
float is about 10 mm below the surface of
the liquid.
(3) When the display becomes stable, record
the displayed value without its minus
sign. (This value is A in the formula
below.)
(4) The density of the liquid can be found by
substituting the measured value in the
following equation:
: Density of liquid (g/cm
3
)
A : Buoyancy of float (g)
V : Volume of float (cm
3
)
d : Density of air (g/cm
3
)
Example: If the measured value (A) is 9.970 g, the volume of the float (V) (stamped on
the float hook) is 10.01 cm
3
, the density of air (d) is 0.001 g/cm
3
and the
temperature indicated by the thermometer is 25°C, then we have:
Содержание GX-13
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