Question

Mole fraction of a solute in 2 molal aqueous solution is

Answer 1

2 molal aq soln means 2 mole solute in 1000 gm water. So mole of water is 1000/18, so mole fraction of solute is
Using formula (Xa= [{n(solute)}/ {n(solute)+ n(solvent)}] is [{2}/{(2)+(1000/18)}] = [{2}/{(2)+(55.55)}]= [(2)/(57.55)] = 0.03474 is the answer.