- #1
yeahyeah<3
- 27
- 0
Homework Statement
Seawater is approximately .60M NaCl. What is the minimum pressure that must be applied at 25 degrees Celsius to purify seawater by reverse osmosis? Assume i=2.0 for NaCl.
Homework Equations
Osmotic pressure = MRT
R= gas constant, .0821 Latm/mol K
The Attempt at a Solution
I started by trying to find the osmotic pressure:
Osmotic pressure = .60M (.0821 Latm/mol K) (298 K)
= 14.68 Latm
I feel like this isn't correct because I didn't use the i=2.0 part.
Can someone tell me what I'm doing wrong?
should i first calculate the boiling point of the solution using delta t = i Kb(m) ?
If so, why and how can I calculate that using m?