SE 42 is a high Smutose corn sD av molecular formula is CuH

SE 42 is a high Smutose corn sD av molecular formula is CuH what is the mole fraution of Sucat what is the molality of fructose? the solustion is 1.340 alm what is the molart of fructose?

Solution

Ans. #a. Let the mass of solution be 1.000 kg = 1000.0 g

# Mass of fructose = 77 % of HSF = 77 % x 1000.0 g = 770.0 g

Moles of fructose = Mass / MW = 770.0 g / (180.15768 g/ mol) = 4.274 mol

# Mass of water (solvent) = 23% of 1000 g = 230.0 g

Moles of water = 230.0 g / (18.0 g/ mol) = 12.778 mol

# Total moles in solution = Moles of fructose + Moles of water

                                    = 4.274 mol + 12.778 mol

                                    = 17.052 mol

# Now,

Mole fraction of fructose = Moles of fructose / Total moles

                        = 4.274 mol / 17.052 mol = 0.2506

Mole fraction of water = 12.778 mol / 17.052 mol = 0.0.7494

#b. Molality of fructose = Moles of fructose / Mass of solvent in kg

                                    = 4.274 mol / 0.230 kg

                                    = 18.5826 m

#c. Volume of solution = Mass / Density = 1000.0 g / (1.346 g/ mL)

= 742.942 mL = 0.742942 L

Now,

            Molarity of sugar = Moles of sugar / Volume of solution in liters

                                    = 4.274 mol / 0.742942 L

                                    = 5.7528 M