Question

#70

#70 A 40/2000 com ooks b.C,H,O eC,H,OH 9 Calculate the number of moles of nonionic solute in 125 g of water if the solution freezes at-1.02C 70. Fructose, also called fruit sugar, C, H o, is nonvolatile and nonionic. For a 2.46 m solution of fructose in water, calculate the following: the freezing point of the solution h the boiling point of the solution at exactly 1 atm 71. AL 30C, the vapor pressure of methanol, CH,OH, is 0.211 atm. What is the mole fraction of CH,Ol in a solution in which the partial pressure of CH,OH is 0.157 atm at 30C %

Answer 1

Answer:-

These questions are answered by using simple concept of colligative properties of the solution which depends on the solute.

The answer is given in the image,

Ang cueso freezing paint 7. seletin = -1.02% boya ge= 0.00-(-1-02) - 1.02°C ATG = kxom m= 4T6 = 1.02 = 0.548m T 1.86 mo molesx1000 masig waterco) Moles = 0.548 x 1250 1000 Moles = 0.0686 moles. 70 m= 2.46m 29 OTE=kma 1.86x2.46=4.58°C += 0.00 -4.58°C --4.58°C (b1 676= kbm = 0.512x2646 ATO=1.26°c

te]00.00 +1.26 = 101.26°C Il po = 0.211 atm P = 0.157 atm Рѕ Р°х Po đ - 2 = 0.151 - 0. 211 X = 0.744 Mole Praction = 0.744