Aqueous magnesium chloride solution is marketed as 20% by mass. Its density is 1.18 g/ml. Calculate the mole fraction of each component. Share with your friends Share 1 Geetha answered this The relation between mass % and molarity isM = d × mass % × 10Molar mass of the solute (where d is the density) = 1.18 × 20 × 10Molar mass of MgCl2 = 1.18 × 20 × 1024 +( 2 × 35.5) = 2.48 MThe relation between molarity and mole fraction of solute isX2 = MM1M(M1~M2) + dWhere M - molarityM1 - molar mass of solventM2 - molar mass of soluted- densityX2 - mole fraction of soluteX2 = MM1M(M1~M2) + d = 2.48 × 182.48 (18 ~95) + 1.18 = 0.2323X1 + X2 = 1X1 = 1 - X2 = 1 - 0.2323 = 0.7677Thus mole fraction of solute = 0.2323Mole fraction of solvent = 0.7677 -6 View Full Answer