Why is the pressure applied on the surface of the solution in osmosis?

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Sanjukta Ghosh
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Homework Statement


Why is the pressure applied on the surface of the solution?

Homework Equations


Definition: If a pure solvent and a solution is separated by a semipermeable membrane the minimum pressure applied on the surface of the solution to stop osmosis is called osmotic pressure.

The Attempt at a Solution

 
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Is that a homework question (as stated), or is it a more general question?
 
I think it's more a general question.

Cause the surface is a boundary between two different substances.
 

Thread 'Modeling a graph that shows age in relation to depth of an ice sample'

To solve this, I first used the units to work out that a= m* a/m, i.e. t=z/λ. This would allow you to determine the time duration within an interval section by section and then add this to the previous ones to obtain the age of the respective layer. However, this would require a constant thickness per year for each interval. However, since this is most likely not the case, my next consideration was that the age must be the integral of a 1/λ(z) function, which I cannot model.
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