question_answer 17)

A solution of glucose in water is labeled as 10 percent w/w, what would be the molality and mole fraction of each component in the solution? If the density of the solution is 1.2 g mL–1, then what shall be the molarity of the solution?

Answer:

10 g of glucose in present in 100 g solution i.e., 10 of glucose has been dissolved in 90 g of water. Volume of 100 g of solution   = 0.083 L Number of moles of glucose  Molarity of solution   Mass of water = 90 g = 0.09 kg  Molality of solution   To find mole fraction of each component Number of moles of glucose Number of moles of water   Total number of moles = 0.055 + 5 = 5.055.  Mole fraction of glucose  Mole fraction of water