Calculate the osmotic pressure at 25°C across a semipermeable membrane separating seawater (1.14 M total particles) from a 0.503 M solution of aqueous NaCl.

The osmotic pressure is 24.6 atm

Explanation:

π = M . R . T . i → Formula for osmotic pressure

i = 2 ⇒  NaCl →  Na⁺ + Cl⁻

i means Van't Hoff factor, which indicates the numbers of ions dissolved, by the stoichiometry.

R → Universal gases constant

T→ T° in K → T°C + 273 → 25°C + 273 = 298K

π = Osmotic pressure

Let's replace data given ⇒ π = 0.503 mol/L . 0.082L.atm/mol.K . 298K .2

π = 24.6 atm

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