(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

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.

2. Relevant equations

Osmotic pressure = MRT

R= gas constant, .0821 Latm/mol K

3. 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?

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# Homework Help: Minimum Pressure applied by reverse osmosis?

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