Chemistry question:
We define osmotic pressure as pressure needed to be applied to stop osmosis. Now a pressure is created by something. So why do we use the equation of osmotic pressure for the solution (which in itself is not creating pressure) rather than what is causing pressure? If X is causing a pressure of for example 700Pa which stops osmosis that pressure has a volume so the equation must be used to refer to object creating pressure.

As per the rules... what do YOU think the answer is first?

https://www.askmehelpdesk.com/math-sciences/announcement-font-color-ff0000-u-b-read-first-expectations-homework-help-board-b-u-font.html

Look at your definition again.

"We define osmotic pressure as pressure needed to be applied to stop osmosis."

The pressure that you're working out is not what already exist (ie, not the one which the solvent causes), but the one which NEEDS to be applied and that pressure needs to be applied where the solution is situated.

so if it is that which must be applied and it is not that of solution so why in the equation PV = nRT we use v as the volume of solution and N - moles of solute rather than V volume of what is causing pressure?

Why do you always talk nonsense stupid?

Roddilla does not find this helpful : stupid answer

Rodilla YOU are a STUPID and IGNORANT person... you are probably butt ugly too.

You can't even get the ugly kid to go out on a date.

READ the Freaking rules MORON. before you show how little class you have with your rude comments.

No damn wonder you are incapable of doing your own homework... and expect others to do it for you.

Apparently in Malta you think your are cute... we think you are an idiot that is incapable of reading or following the rules of the site... I find it hard to believe everyone from Malta are as rude as you are.

Get a damn life... or quit school. You clearly lack the brainpower to do it.

But then you aren't intelligent enough to do that.

JERK!

SInce you have the attention span of a goldfish... here are the rules.. for homework you acted like a spoiled little brat over

Read this first: Expectations for the Homework Help board

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And since you lack any common sense or courtesy.. here is the OTHER rule you broke with your IGNORANT rant.

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It's the same issue. Since you're looking for the pressure needed, that is the pressure which is on the side of the solution, the volume, number of moles should also concern the solution.