Calculate the molar mass of non volatile solute when 5 g of it is dissolved in 50 g solvent, boils at 119.6^ C . [ K _ b =3.2 ~K ~kg ~mol ⁻¹ . , boiling point of pure solvent .=118^ C ] .

Step-by-step solution

aligned & T _ b = T _ b - T _ b ^0=119.6-118=1.6^ C =1.6 ~K & ~T _ b = 1000 ~K _ b W ₂ M ₂ ~W ₁ & M ₂= 1000 ~K _ b W ₂ ~T _ b W ₁ = 1000 3.2 ~K ~kg ~mol ⁻¹ 5 ~g 1.6 ~K 50 ~g & =200 ~g ~mol ⁻¹ aligned