Explain the relation between osmotic pressure and concentration of so

1.	Explain the relation between osmotic pressure and concentration of solution.
Answer» (1) Consider V dm³ of a solution in which n₁moles of a solvent contains n₂ moles of a nonvolatile solute at absolute temperature T. (2) The osmotic pressure, n of a solution is given by, π = \(\frac{nRT}{V}\) R is gas constant having value 0.08206 dm³ atm K^-1 mol^-1 (OR L atm K^-1 mol^-1). Since concentration, C of a solution is in mol dm^-3 or molarity is, C = \(\frac{n}{V}\) mol dm^-3 or M ∴ π = CRT (If concentration C is expressed in mol^-3 m and R = 8.314 J K^-1 mol^-1, then π will be in SI units, pascals or Nm^-2)

Explain the relation between osmotic pressure and concentration of solution.

Answer»

(1) Consider V dm³ of a solution in which n₁moles of a solvent contains n₂ moles of a nonvolatile solute at absolute temperature T.

(2) The osmotic pressure, n of a solution is given by,

π = \(\frac{nRT}{V}\)

R is gas constant having value 0.08206 dm³ atm K^-1 mol^-1 (OR L atm K^-1 mol^-1). Since concentration, C of a solution is in mol dm^-3 or molarity is,

C = \(\frac{n}{V}\) mol dm^-3 or M

∴ π = CRT

(If concentration C is expressed in mol^-3 m and R = 8.314 J K^-1 mol^-1, then π will be in SI units, pascals or Nm^-2)

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