Osmolarity of `0.02`M potassium ferrocyanide solution `300K` si (assuem solute is `100%`ionized)

Options

A. 0.10 osmol
B. 0.20 osmol
C. 0.02 osmol
D. 0.004 osmol

Answer

A

Explanation

Osmotic pressure is a colligative property ,hence osmolarity is the molarity of the solution involving van't Hoff factor.
`K_(4)[Fe(CN)_(6)]rArrunderset(y=5)ubrace(4K^(+)+[Fe(CN)_(6)]^(4-))`
`i=[1+(y-1)x]=1+4x=5`
`(x=1)` Thus ,osmolarity =`0.02xxi=0.02xx5=0.10` osmol