Homework Help: Chemistry

Posted by Anonymous on Monday, December 10, 2012 at 7:09pm.

A reverse osmosis unit is used to obtain drinkable water from a source that contains 0.530 g NaCl per liter. What is the minimum pressure (in torr) that must be applied across the semipermeable membrane to obtain water? Assume room temperature or about 298 K. (Don′t forget the van′t Hoff factor!)

I'm not really sure what to do with this question. I know for osmotic pressure, the equation is iMRT, but I don't know what exactly to do.

Chemistry - DrBob222, Tuesday, December 11, 2012 at 12:41am
This should get you started.
You know M NaCl = grams/molar mass and that's in 1 L so that is the molarity.
i = van't Hoff factor = 2 for NaCl
R is 0.08206
T = 298.
solve for pi (in atm) and convert to torr..

Answer this Question

Related Questions

college chemistry - A) In some regions of the southwest United States, the water...
Chemistry - I need to know how to dilute a 1L IV bag of 0.45% NaCl with 3.5% ...
Chemistry - In reverse osmosis, water flows out of a salt solution until the ...
chemistry - In reverse osmosis, water flows out of a salt solution until the ...
chemistry - In reverse osmosis, water flows out of a salt solution until the ...
Chemistry - In reverse osmosis, water flows out of a salt solution until the ...
chemistry hw - SOMEONE PLEASE HELP AND CONFIRM THE RIGHT ANSWER FOR ME...I HAVE ...
Chem - In reverse osmosis, water flows out of a salt solution until the osmotic ...
Chemistry - A 15.0% (by mass) NaCl solution is available.. Determine what mass ...
Chemistry - In reverse osmosis, water flows out of a salt solution until the ...

For Further Reading

First Name:
School Subject:
Answer: