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Chemistry:The Central Science
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#Post#: 595--------------------------------------------------
Surface Tension
DIR By: PIRAH SALEEM
Date: August 31, 2012, 3:28 pm
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what`s the effect on surface tension of water if we add a soap
solution in it?
#Post#: 599--------------------------------------------------
Re: Surface Tension
DIR By: Michel
Date: September 1, 2012, 7:03 am
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You should have some ideas..tell what you think
#Post#: 607--------------------------------------------------
Re: Surface Tension
DIR By: PIRAH SALEEM
Date: September 5, 2012, 1:38 pm
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I think it `ll lower the temperature of water so surface tension
will rise...but am not quite sure about that
#Post#: 611--------------------------------------------------
Re: Surface Tension
DIR By: Michel
Date: September 6, 2012, 8:58 am
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--- Quote from: PIRAH SALEEM link ---
>
> I think it `ll lower the temperature of water so surface
tension will rise...but am not quite sure about that
>
--- End Quote ---
It's quite the opposite. Soaps drastically decrease the surface
tension of water. Surface tension is an effect caused by the
attraction of the surface molecules to the inner molecules in
liquid water. When soap is dissolved in water, the presence of
soap molecules weakens the relative forces of attraction between
the water molecules, thus reducing the surface tension.
#Post#: 785--------------------------------------------------
Re: Surface Tension
DIR By: PIRAH SALEEM
Date: October 1, 2012, 1:41 pm
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Is`nt soap solution cool??
#Post#: 789--------------------------------------------------
Re: Surface Tension
DIR By: Michel
Date: October 1, 2012, 10:43 pm
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Yes, but your question is
--- Quote from: PIRAH SALEEM link ---
>
> what`s the effect on surface tension of water if we add a soap
solution in it?
>
--- End Quote ---
Water is generally cool to the skin, just as soap solution is.
most likely a beaker of soap solution and a beaker of water will
not have much difference in temperature, yet the surface tension
of the soap solution will be much lower than that of water. This
is because the dissolved ions and the soap molecules mix between
water molecules, and also form weak chemical bonds with water
molecules, thus reducing the attractive forces between water
molecules. When the attractive forces between water molecules is
reduced, surface tension reduces as well.
#Post#: 882--------------------------------------------------
Re: Surface Tension
DIR By: angelroseta88@yahoo.com
Date: October 13, 2012, 1:55 pm
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what is surface tension ?
#Post#: 1218--------------------------------------------------
Re: Surface Tension
DIR By: PIRAH SALEEM
Date: November 24, 2012, 2:02 am
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Surface tension may be regarded as force per unit length or
energy per unit area of the surface of liquid :)
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