Answer any three of the following questions. a) 31 g of an unknown molecular material is dissolved in 500 g of water. The resulting solution freezes at 271.14 K. Calculate the molar mass of the material. Given : K_t for water =1.86"KK gmol1" T_(t)^(@) of water =273K.

Answer any three of the following questions. a) 31 g of an unknown mo

1.	Answer any three of the following questions. a) 31 g of an unknown molecular material is dissolved in 500 g of water. The resulting solution freezes at 271.14 K. Calculate the molar mass of the material. Given : K_t for water =1.86"KK gmol1" T_(t)^(@) of water =273K.
Answer» SOLUTION :`M_2 = (k_f xx w_2 xx 1000)/(Delta T_f xx w_1)` `M_2 = (1.86 K kg mol^(-1) xx 31.0 g xx 1000 g kg^(-1))/(1.86 K xx 500 g)` `M_2 = 62 g mol^(-1)` (b) When a pressure more than the osmotic pressure is applied on a concentrated solution solvent flows from the concentrated solution to dilute solution through semi PERMEABLE membrane/ pure solvent flows out of the solution through semi permeable membrane if a pressure LARGER than the osmotic pressure is applied. Desalination of WATER.