An aqueous solution contains 20 wt% NaCl(s) and 0.015 Ibm KCl. (mA,NaCl=58g/mol, mA,KCl=74g/mol, mA,H20=18g/mol)(Assume that the total weight of solution is 100 g) (10p)

1- Calculate mole amount of NaCl in composition. 2- Calculate mole amount of KCl in composition. 3- Calculate mole amount of H2O in composition. 4- Calculate mole fraction of NaCl in composition.

5- Calculate mole fraction of KCl in composition.

6- Calculate mole fraction of H2O in composition.

7- Calculate the avarage molecular weight of composition.