SolutionHard
Question
Density of 1M solution of a non-electrolyte C6H12O6 is 1.18 g/mL. If Kf (H2O) is 1.86o mol-1 kg, solution freezes at :
Options
A.- 1.58oC
B.- 1.86oC
C.- 3.16oC
D.1.86oC
Solution
1M C6H12O6 (molar mass = 180 g mol-1)
1000 mL solution has = 180 g solute
1180 g solution has = 180 g solute
1000 g solvent has = 180 g solute
Thus, molality = 1 molal
∴ ᐃTf = Kf molality
= 1.86 × 1 = 1.86o
∴ F.P. = - 1.86oC
1000 mL solution has = 180 g solute
1180 g solution has = 180 g solute
1000 g solvent has = 180 g solute
Thus, molality = 1 molal
∴ ᐃTf = Kf molality
= 1.86 × 1 = 1.86o
∴ F.P. = - 1.86oC
Create a free account to view solution
View Solution FreeMore Solution Questions
The freezing point (in oC) of a solution containing 0.1 g of K3[ Fe(CN)6 ] (Mol. Wt. 329) in 100 g of water (Kf = 1.86 K...An aqueous solution of sucrose is 0.5 molal. What is the vapour pressure of water above this solution? The vapour pressu...Liquids P and Q form an ideal solution. The vapour pressures of pure liquids P and Q at 80°C are 300 mm and 100 mm of Hg...Which one of the following aqueous solutions will exhibit highest boiling point?...If 0.1 molar solution of glucose is separated from 0.1 molar solution of cane sugar by a semipermeable membrane, then wh...