29
3.14.2 Solid Density Determinations
(Cont.)
For density determination of solids with a density less than 1 g/cm
3
, the bottom of the Weigh Below Hook for solids
must be used as it holds the solid body below the surface of the auxiliary liquid. If the buoyancy of the solid is
greater than the weight of the Weigh Below Hook, the Weigh Below Hook must be weighted by placing an additional
mass on the submerged part of the Weigh Below Hook as shown.
After loading the additional mass, tare the balance and start the weighing again.
• Wait until the balance has reached stability and note the displayed weight
P (buoyancy of the solid).
• Now determine the density
Q
1
of the solid by dividing the first weight
A (weight of the solid in air) by the second
result
P (buoyancy) and multiplying this result by the known density Q
0
of the auxiliary liquid (at the temperature
read off of the thermometer).
Q
1
= • Q
0
[g / cm
3
]
A
P
Sample
Mass
Buoyancy Sample Weighing
3.14 Density (Cont.)
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