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Table 6.4 – The results of determining the density of liquid
(formation water) by means of pycnometer.

Index, unit of measurement Designation Results of

measurements

1 2 3 4
1 The mass of dried empty m

pycnometer, g
2 The mass of pycnometer with m
1
distilled water, g

3 The mass of pycnometer with m

2

the tested liquid (for example
formation water), g
4 The density of the tested ρ
20
l
liquid determined by means
of pycnometer under the
3
temperature 20 °С, g/сm

6.5 Checking questions

6.5.1 What is the density of liquid (gas)? What unit is density
measured in?

6.5.2 How does oil density vary under temperature 20 °С and
atmospheric pressure? What kinds of oil are considered to be the
most valuable?
6.5.3 What equipment, devices and materials are used for the

laboratory experiment?
6.5.4 What devices are used for determining the density of
liquids, gases and powder substances? Enumerate them, their types

and describe them.
6.5.5 How is the density of liquid determined by means of
areometer?
6.5.6 How is absolute and relative error for the results of

measuring the density of liquid determined by means of areometer?
Write down the equations.
6.5.7 Write the equation for determining the density of oil (oil

product) under the temperature t which differs from 20 °С. Give

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