[Roddilla]

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.

[smoothy]

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

https://www.askmehelpdesk.com/math-s...-b-u-font.html

[Unknown008]

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.

[Roddilla]

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?

[Roddilla]

Why do you always talk nonsense stupid?

[smoothy]

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!

[smoothy]

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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Do not simply retype or paste a question from your book or study material

We won't do your homework questions for you.
You were given the assignment for you to learn.

If you come up with your own answer and post it for us to critique that is within reason.

If you have some SPECIFIC questions that you couldn't find or didn't understand, we may help with that.
But this is your assignment, so show us you have at least attempted to complete it on your own.

Thank you.

[smoothy]

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

Using the Comments Feature - Official Guidelines

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The Comments feature has undergone changes under the new "skin" (This site has different Interfaces, called skins, which changes the way members see the site and some features are different). So I'm revising theses guidelines accordingly (10/10/10). I propose the following guidelines for using the Comments feature.

First, comments and ratings have been separated in the new skin. Ratings are governed by Thumbs Up/ Thumbs Down icons next to an "is this helpful" question, marked Yes and No in the new skin. Older skins will see a Comments on this Post box with Agree/Disagree radio buttons. Most of what follows applies primarily to those.

Positive comments should be given under the following circumstances:
1) From the asker as a thank you
2) From other members to ratify the factual correctness of an answer
3) From other members to agree with the opinions expressed

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2) From the asker if the advice turned out to be incorrect

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These are the guidelines I follow when I use the comments feature. Opinions anyone?

The new skin also has the ability to simply add a comment to a post without a rating. These comments should NOT be used to provide or ask for followup information. This is because a) the space provided for comments is limited and b) the comments are not time stamped. The original poster (OP) should use the comments for thanks yous or the like. Other posters should use the comments for a quick comment on the quality of the advice. Otherwise the Answer options should be used to provide additional information or ask a followup question.

Scott<>

Note: The operators of this site have agreed with and approved the guidelines so they are now official.

[Unknown008]

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.