What mass of solute (molar mass 58 ~g ~mol ⁻¹ ) is to be dissolved in 2.5 dm ^3 H ₂ O to generate osmotic pressure of 0.245 atm at 300 K ? ( R =0.0821 dm ^3 ~atm ~K ~mol ⁻¹ ) .

Step-by-step solution

aligned & =C R T & = W ₂ R T M ₂ V & W ₂= M ₂ V R T & W ₂= 0.245 ~atm 58 ~g ~mol ⁻¹ 2.5 dm ^3 0.0821 dm ^3 ~atm ~K ⁻¹ ~mol ⁻¹ 300 ~K & Mass of solute =1.44 ~g aligned