The mole fraction of a solute in a solution is 0.1. At 298 K, molarity of this solution is the same as its molality. Density of this solution is the same as its molality. Density of this solution is at 298 K is 2.0 g/cm3. The ratio of the molecular weights of the solute and solvent, (MWsolute/MWsolvent) is

Asked by Anil | 24th May, 2017, 02:46: PM

Expert Answer:

straight X subscript solute over straight X subscript solvent space equals space fraction numerator 0.1 over denominator 0.9 end fraction space equals space 1 over 9  straight W subscript solute over straight W subscript solvent space cross times space straight M subscript solvent over straight M subscript solute space equals space 1 over 9 space........ left parenthesis Eq.1 right parenthesis  straight W subscript solute space space plus space straight W subscript solvent space space equals space Density space cross times space Volume  straight W subscript solute space space plus space straight W subscript solvent space equals space 2 space cross times space straight V  Molarity space equals space Molality space....... left parenthesis Given right parenthesis  straight n subscript solute over straight V subscript solution space equals space straight n subscript solute over straight W subscript solvent space  straight W subscript solvent space equals space straight V subscript solution space equals space fraction numerator straight W subscript solute space space plus space straight W subscript solvent over denominator 2 end fraction 2 space straight W subscript solvent space equals space straight W subscript solute space space plus space straight W subscript solvent  straight W subscript solute space space equals space space straight W subscript solvent space............ left parenthesis Eq.2 right parenthesis From space left parenthesis 1 right parenthesis space and space left parenthesis 2 right parenthesis comma  straight M subscript solute over straight M subscript solvent space equals space 9

Answered by Arvind Diwale | 24th May, 2017, 04:50: PM