The objective of the lad is to measure the density of some liquids with the help of a hydrometer.
UDC engineering department. 2nd floor laboratory.
The density is calculated by measuring the temperature and specific gravity.
First of all the hydrometer is filled with water and carefully checked that it is cleared. Then with the help of a thermometer, the temperature of the liquids is recorded and water is replaced with the liquids to be tested. The hydrometer is floated in each liquid to take the reading.
|liquid||Temperature oC||Specific gravity g/cm3|
Graphical representation of data:
We can conclude that when the temperature of the liquids is low, the hydrometer would record the specific gravity to be more.
Liquid density and specific gravity using pycnometer
The use of pycnometer for the measurement of specific gravity and density.
The weight change in a density bottle that is filled with the liquid that we want to test for density and specific gravity.
UDC engineering department. 2nd floor laboratory
Following equipment was used Equipment:
50 ml gay Lussac Pycnometer
Liquids for testing
Lever operated balance
F1-30 fluid properties apparatus
The level balance is set up on a solid surface for an accurate reading. The lever balance supplied with F1-30 is sufficient to demonstrate how to change weight can be used to find the liquid density. It is pertinent to know that it has to be ensured that the pycnometer is dry. Now fill the pycnometer with whatever liquid that has to be tested. After the bubbles have settled down, the stopper is fully inserted.
|Water||Vegetable oil||Olive oil|
|Volume of pycnometer||50ml||50ml||50ml|
|Dry weight of pycnometer||Mp= 18.62||Mp= 18.62||Mp= 18.62|
|Weight increase due to liquid||ML = Mp+L – Mp = 50.36||ML = Mp+L – Mp= 46.38||ML = Mp+L – Mp = 46.20|
|Filled weight of pycnometer||Mp+L = 68.98||Mp+L = 65||Mp+L = 64.82|
Following are the Calculations:
For vegetable oil:
Density is calculated by keeping the volume of the liquid constant. Pycnometer is utilized to measure the density.