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BACKGROUND
The stalagmometer consist of a glass capillary tube with a bulb at the middle.There is a capillary bore at the tip of the stalagmometer. The surface tension of the liquid can be calculated using following formula.1-3
Where, v1 =surface tension of test liquid
v2 =surface tension of water
ρ1&ρ2 =Density of test liquid &water
n1=no.of drops of test liquid
n2=no .of drops of water
Aim: To determine the surface tension of given liquid by drop count method using stalagmometer.
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REQUIREMENTS
Apparatus: Stalagmometer,
Beakers,
Measuring cylinder.
Chemicals: Water,
Acetone,
Ethanol,
Benzene.
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PROCEDURE
The procedure was repeated 3 times to obtain the mean value.Then the surface tension can be calculated using above formula.
Tabulation
|
LIQUID |
NO OF DROPS |
DENSITY |
SURFACE TENSION |
|||
|
1 |
2 |
3 |
MEAN |
|||
|
WATER |
||||||
|
ETHANOL |
||||||
|
ACETONE |
||||||
|
TOLUENE |
||||||
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CONCLUSION
From the above expt. We concluded that the surface tension of the given liquid is found to be————-.
[ps2id id=’references’ target=”/][ps2id id=’1′ target=”/]
